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冲chōng之zhī又yòu令lìng上shàng元yuán年nián在zài甲jiǎ子zi。臣chén法fǎ兴xīng议yì:夫fū置zhì元yuán设shè纪jì,各gè有yǒu所suǒ尚shàng,或huò据jù文wén于yú图tú谶chèn,或huò取qǔ效xiào于yú当dāng时shí。冲chōng之zhī云yún,“群qún氏shì纠jiū纷fēn,莫mò审shěn其qí会huì”。昔xī《黄huáng帝dì》辛xīn卯mǎo,日rì月yuè不bù过guò;《颛zhuān顼xū》乙yǐ卯mǎo,四sì时shí不bù忒tè;《景jǐng初chū》壬rén辰chén,晦huì无wú差chà光guāng;《元yuán嘉jiā》庚gēng辰chén,朔shuò无wú错cuò景jǐng,岂qǐ非fēi承chéng天tiān者zhě乎hū!冲chōng之zhī苟gǒu存cún甲jiǎ子zi,可kě谓wèi为wèi合hé以yǐ求qiú天tiān也yě。

冲chōng之zhī又yòu令lìng日rì月yuè五wǔ纬wěi,交jiāo会huì迟chí疾jí,悉xī以yǐ上shàng元yuán为wèi始shǐ。臣chén法fǎ兴xīng议yì:夫fū交jiāo会huì之zhī元yuán,则zé食shí既jì可kě求qiú,迟chí疾jí之zhī际jì,非fēi凡fán夫fū所suǒ测cè。昔xī贾jiǎ逵kuí略lüè见jiàn其qí差chà,刘liú洪hóng觕cū著zhù其qí术shù。至zhì于yú疏shū密mì之zhī数shù,莫mò究jiū其qí极jí。且qiě五wǔ纬wěi所suǒ居jū,有yǒu时shí盈yíng缩suō,即jí如rú岁suì星xīng在zài轸zhěn,见jiàn超chāo七qī辰chén,术shù家jiā既jì追zhuī算suàn以yǐ会huì今jīn,则zé往wǎng之zhī与yǔ来lái,断duàn可kě知zhī矣yǐ。《景jǐng初chū》所suǒ以yǐ纪jì首shǒu置zhì差chà,《元yuán嘉jiā》兼jiān又yòu各gè设shè后hòu元yuán者zhě,其qí并bìng省shěng功gōng于yú实shí用yòng,不bù虚xū推tuī以yǐ为wéi烦fán也yě。冲chōng之zhī既jì违wéi天tiān于yú改gǎi易yì,又yòu设shè法fǎ以yǐ遂suì情qíng,愚yú谓wèi此cǐ治zhì历lì之zhī大dà过guò也yě。

臣chén法fǎ兴xīng议yì:日rì有yǒu八bā行xíng,各gè成chéng一yī道dào,月yuè有yǒu一yī道dào,离lí为wèi九jiǔ行xíng,左zuǒ交jiāo右yòu疾jí,倍bèi半bàn相xiāng违wéi,其qí一yī终zhōng之zhī理lǐ,日rì数shù宜yí同tóng。冲chōng之zhī通tōng周zhōu与yù会huì周zhōu相xiāng觉jué九jiǔ千qiān四sì十shí,其qí阴yīn阳yáng七qī十shí九jiǔ周zhōu有yǒu奇qí,迟chí疾jí不bù及jí一yī匝zā。此cǐ则zé当dāng缩suō反fǎn盈yíng,应yīng损sǔn更gèng益yì。

冲chōng之zhī随suí法fǎ兴xīng所suǒ难nán辩biàn折zhé之zhī曰yuē:

臣chén少shǎo锐ruì愚yú尚shàng,专zhuān功gōng数shù术shù,搜sōu练liàn古gǔ今jīn,博bó采cǎi沈shěn奥ào,唐táng篇piān夏xià典diǎn,莫mò不bù揆kuí量liàng,周zhōu正zhèng汉hàn朔shuò,咸xián加jiā该gāi验yàn。罄qìng策cè筹chóu之zhī思sī,究jiū疏shū密mì之zhī辨biàn。至zhì若ruò立lì圆yuán旧jiù误wù,张zhāng衡héng述shù而ér弗fú改gǎi;汉hàn时shí斛hú铭míng,刘liú歆xīn诡guǐ谬miù其qí数shù,此cǐ则zé算suàn氏shì之zhī剧jù疵cī也yě。《乾qián象xiàng》之zhī弦xián望wàng定dìng数shù,《景jǐng初chū》之zhī交jiāo度dù周zhōu日rì,匪fěi谓wèi测cè候hòu不bù精jīng,遂suì乃nǎi乘chéng除chú翻fān谬miù,斯sī又yòu历lì家jiā之zhī甚shèn失shī也yě。及jí郑zhèng玄xuán、阚hǎn泽zé、王wáng蕃fān、刘liú徽huī,并bìng综zōng数shù艺yì,而ér每měi多duō疏shū舛chuǎn。臣chén昔xī以yǐ暇xiá日rì,撰zhuàn正zhèng众zhòng谬miù,理lǐ据jù炳bǐng然rán,易yì可kě详xiáng密mì,此cǐ臣chén以yǐ俯fǔ信xìn偏piān识shí,不bù虚xū推tuī古gǔ人rén者zhě也yě。按àn何hé承chéng天tiān历lì,二èr至zhì先xiān天tiān,闰rùn移yí一yí月yuè,五wǔ星xīng见jiàn伏fú,或huò违wéi四sì旬xún,列liè差chà妄wàng设shè,当dāng益yì反fǎn损sǔn,皆jiē前qián术shù之zhī乖guāi远yuǎn,臣chén历lì所suǒ改gǎi定dìng也yě。既jì沿yán波bō以yǐ讨tǎo其qí源yuán,删shān滞zhì以yǐ暢chàng其qí要yào,能néng使shǐ躔chán次cì上shàng通tōng,晷guǐ管guǎn下xià合hé,反fǎn以yǐ讥jī诋dǐ,不bù其qí惜xī乎hū!寻xún法fǎ兴xīng所suǒ议yì六liù条tiáo,并bìng不bù造zào理lǐ难nán之zhī关guān楗jiàn。谨jǐn陈chén其qí目mù。

其qí一yī,日rì度dù岁suì差chà,前qián法fǎ所suǒ略lüè,臣chén据jù经jīng史shǐ辨biàn正zhèng此cǐ数shù,而ér法fǎ兴xīng设shè难nán,征zhēng引yǐn《诗shī》《书shū》,三sān事shì皆jiē谬miù。其qí二èr,臣chén校xiào晷guǐ景jǐng,改gǎi旧jiù章zhāng法fǎ,法fǎ兴xīng立lì难nán,不bù能néng有yǒu诘jí,直zhí云yún“恐kǒng非fēi浅qiǎn虑lǜ,所suǒ可kě穿chuān凿záo”。其qí三sān,次cì改gǎi方fāng移yí,臣chén无wú此cǐ法fǎ,求qiú术shù意yì误wù,横héng生shēng嫌xián贬biǎn。其qí四sì,历lì上shàng元yuán年nián甲jiǎ子zi,术shù体tǐ明míng整zhěng,则zé苟gǒu合hé可kě疑yí。其qí五wǔ,臣chén其qí历lì七qī曜yào,咸xián始shǐ上shàng元yuán,无wú隙xì可kě乘chéng,复fù云yún“非fēi凡fán夫fū所suǒ测cè”。其qí六liù,迟chí疾jí阴yīn阳yáng,法fǎ兴xīng所suǒ未wèi解jiě,误wù谓wèi两liǎng率lǜ日rì数shù宜yí同tóng。凡fán此cǐ众zhòng条tiáo,或huò援yuán谬miù目mù讥jī,或huò空kōng加jiā抑yì绝jué,未wèi闻wén折zhé正zhèng之zhī谈tán,厌yàn心xīn之zhī论lùn也yě。谨jǐn随suí诘jí洗xǐ释shì,依yī源yuán征zhēng对duì。仰yǎng照zhào天tiān晖huī,敢gǎn罄qìng管guǎn穴xué。

法fǎ兴xīng议yì曰yuē:“夫fū二èr至zhì发fā敛liǎn,南nán北běi之zhī极jí,日rì有yǒu恆héng度dù,而ér宿sù无wú改gǎi位wèi。故gù古gǔ历lì冬dōng至zhì,皆jiē在zài建jiàn星xīng”。冲chōng之zhī曰yuē:周zhōu汉hàn之zhī际jì,畴chóu人rén丧sàng业yè,曲qū技jì竞jìng设shè,图tú纬wěi实shí繁fán,或huò借jiè号hào帝dì王wáng以yǐ崇chóng其qí大dà,或huò假jiǎ名míng圣shèng贤xián以yǐ神shén其qí说shuō。是shì以yǐ谶chèn记jì多duō虚xū,桓huán谭tán知zhī其qí矫jiǎo妄wàng;古gǔ历lì舛chuǎn杂zá,杜dù预yù疑yí其qí非fēi直zhí。按àn《五wǔ纪jì论lùn》黄huáng帝dì历lì有yǒu四sì法fǎ,颛zhuān顼xū、夏xià、周zhōu并bìng有yǒu二èr术shù,诡guǐ异yì纷fēn然rán,则zé孰shú识shí其qí正zhèng,此cǐ古gǔ历lì可kě疑yí之zhī据jù一yī也yě。夏xià历lì七qī曜yào西xī行xíng,特tè违wéi众zhòng法fǎ,刘liú向xiàng以yǐ为wéi后hòu人rén所suǒ造zào,此cǐ可kě疑yí之zhī据jù二èr也yě。殷yīn历lì日rì法fǎ九jiǔ百bǎi四sì十shí,而ér《乾qián凿záo度dù》云yún殷yīn历lì以yǐ八bā十shí一yī为wèi日rì法fǎ。若ruò《易yì纬wěi》非fēi差chà,殷yīn历lì必bì妄wàng,此cǐ可kě疑yí之zhī据jù三sān也yě。《颛zhuān顼xū》历lì元yuán,岁suì在zài乙yǐ卯mǎo,而ér《命mìng历lì序xù》云yún:“此cǐ术shù设shè元yuán,岁suì在zài甲jiǎ寅yín。”此cǐ可kě疑yí之zhī据jù四sì也yě。《春chūn秋qiū》书shū食shí有yǒu日rì朔shuò者zhě凡fán二èr十shí六liù,其qí所suǒ据jù历lì,非fēi周zhōu则zé鲁lǔ。以yǐ周zhōu历lì考kǎo之zhī,检jiǎn其qí朔shuò日rì,失shī二èr十shí五wǔ,鲁lǔ历lì校xiào之zhī,又yòu失shī十shí三sān。二èr历lì并bìng乖guāi,则zé必bì有yǒu一yī伪wěi,此cǐ可kě疑yí之zhī据jù五wǔ也yě。古gǔ之zhī六liù术shù,并bìng同tóng《四sì分fēn》,《四sì分fēn》之zhī法fǎ,久jiǔ则zé后hòu天tiān。以yǐ食shí检jiǎn之zhī,经jīng三sān百bǎi年nián,辄zhé差chà一yī日rì。古gǔ历lì课kè今jīn,其qí甚shèn疏shū者zhě,朔shuò后hòu天tiān过guò二èr日rì有yǒu余yú。以yǐ此cǐ推tuī之zhī,古gǔ术shù之zhī作zuò,皆jiē在zài汉hàn初chū周zhōu末mò,理lǐ不bù得dé远yuǎn。且qiě却què校xiào《春chūn秋qiū》,朔shuò并bìng先xiān天tiān,此cǐ则zé非fēi三sān代dài以yǐ前qián之zhī明míng征zhēng矣yǐ,此cǐ可kě疑yí之zhī据jù六liù也yě。寻xún《律lǜ历lì志zhì》,前qián汉hàn冬dōng至zhì日rì在zài斗dòu牛niú之zhī际jì,度dù在zài建jiàn星xīng,其qí势shì相xiāng邻lín,自zì非fēi帝dì者zhě有yǒu造zào,则zé仪yí漏lòu或huò阙quē,岂qǐ能néng穷qióng密mì尽jǐn微wēi,纤xiān毫háo不bù失shī。建jiàn星xīng之zhī说shuō,未wèi足zú证zhèng矣yǐ。

法fǎ兴xīng议yì曰yuē:“战zhàn国guó横héng骛wù,史shǐ官guān丧sàng纪jì,爰yuán及jí汉hàn初chū,格gé候hòu莫mò审shěn,后hòu杂zá觇chān知zhī在zài南nán斗dòu二èr十shí二èr度dù,元yuán和hé所suǒ用yòng,即jí与yǔ古gǔ历lì相xiāng符fú也yě。逮dǎi至zhì景jǐng初chū,终zhōng无wú毫háo忒tè。”冲chōng之zhī曰yuē:古gǔ术shù讹é杂zá,其qí详xiáng阙quē闻wén,乙yǐ卯mǎo之zhī历lì,秦qín代dài所suǒ用yòng,必bì有yǒu效xiào于yú当dāng时shí,故gù其qí言yán可kě征zhēng也yě。汉hàn武wǔ改gǎi创chuàng,检jiǎn课kè详xiáng备bèi,正zhèng仪yí审shěn漏lòu,事shì在zài前qián史shǐ,测cè星xīng辨biàn度dù,理lǐ无wú乖guāi远yuǎn。今jīn议yì者zhě所suǒ是shì不bù实shí见jiàn,所suǒ非fēi徒tú为wèi虚xū妄wàng,辨biàn彼bǐ骇hài此cǐ,既jì非fēi通tōng谈tán,运yùn今jīn背bèi古gǔ,所suǒ诬wū诚chéng多duō,偏piān据jù一yī说shuō,未wèi若ruò兼jiān今jīn之zhī为wèi长zhǎng也yě。《景jǐng初chū》之zhī法fǎ,实shí错cuò五wǔ纬wěi,今jīn则zé在zài冲chōng口kǒu,至zhì曩nǎng已yǐ移yí日rì。盖gài略lüè治zhì朔shuò望wàng,无wú事shì检jiǎn候hòu,是shì以yǐ晷guǐ漏lòu昏hūn明míng,并bìng即jí《元yuán和hé》,二èr分fēn异yì景jǐng,尚shàng不bù知zhī革gé,日rì度dù微wēi差chà,宜yí其qí谬miù矣yǐ。

法fǎ兴xīng议yì曰yuē:“《书shū》云yún‘日rì短duǎn星xīng昴mǎo,以yǐ正zhèng仲zhòng冬dōng’。直zhí以yǐ月yuè推tuī四sì仲zhòng,则zé中zhōng宿sù常cháng在zài卫wèi阳yáng,羲xī、和hé所suǒ以yǐ正zhèng时shí,取qǔ其qí万wàn代dài不bù易yì也yě。冲chōng之zhī以yǐ为wéi唐táng代dài冬dōng至zhì,日rì在zài今jīn宿sù之zhī左zuǒ五wǔ十shí许xǔ度dù,遂suì虚xū加jiā度dù分fēn,空kōng撤chè天tiān路lù。”冲chōng之zhī曰yuē:《书shū》以yǐ上shàng四sì星xīng昏hūn中zhōng审shěn分fēn至zhì者zhě,据jù人rén君jūn南nán面miàn而ér言yán也yě。且qiě南nán北běi之zhī正zhèng,其qí详xiáng易yì准zhǔn,流liú见jiàn之zhī势shì,中zhōng天tiān为wèi极jí。先xiān儒rú注zhù述shù,其qí义yì佥qiān同tóng,而ér法fǎ兴xīng以yǐ为wéi《书shū》说shuō四sì星xīng,皆jiē在zài卫wèi阳yáng之zhī位wèi,自zì在zài巳sì地dì,进jìn失shī向xiàng方fāng,退tuì非fēi始shǐ见jiàn,迂yū回huí经jīng文wén,以yǐ就jiù所suǒ执zhí,违wéi训xùn诡guǐ情qíng,此cǐ则zé甚shèn矣yǐ。舍shě午wǔ称chēng巳sì,午wǔ上shàng非fēi无wú星xīng也yě。必bì据jù中zhōng宿sù,余yú宿sù岂qǐ复fù不bù足zú以yǐ正zhèng时shí。若ruò谓wèi举jǔ中zhōng语yǔ兼jiān七qī列liè者zhě,觜zī参cān尚shàng隐yǐn,则zé不bù得dé言yán,昴mǎo星xīng虽suī见jiàn,当dāng云yún伏fú矣yǐ,奎kuí娄lóu已yǐ见jiàn,复fù不bù得dé言yán伏fú见jiàn囗wéi囗wéi不bù得dé以yǐ为wéi辞cí,则zé名míng将jiàng何hé附fù。若ruò中zhōng宿sù之zhī通tōng非fēi允yǔn,当dāng实shí谨jǐn检jiǎn经jīng旨zhǐ,直zhí云yún星xīng昴mǎo,不bù自zì卫wèi阳yáng,卫wèi阳yáng无wú自zì显xiǎn之zhī义yì,此cǐ谈tán何hé因yīn而ér立lì。苟gǒu理lǐ无wú所suǒ依yī,则zé可kě愚yú辞cí成chéng说shuō,曾céng泉quán、桑sāng野yě,皆jiē为wèi明míng证zhèng,分fēn至zhì之zhī辨biàn,竟jìng在zài何hé日rì,循xún复fù再zài三sān,窃qiè深shēn叹tàn息xī。

法fǎ兴xīng议yì曰yuē:“其qí置zhì法fǎ所suǒ在zài,近jìn违wéi半bàn次cì,则zé四sì十shí五wǔ年nián九jiǔ月yuè率lǜ移yí一yí度dù。”冲chōng之zhī曰yuē:《元yuán和hé》日rì度dù,法fǎ兴xīng所suǒ是shì,唯wéi征zhēng古gǔ历lì在zài建jiàn星xīng,以yǐ今jīn考kǎo之zhī,臣chén法fǎ冬dōng至zhì亦yì在zài此cǐ宿sù,斗dòu二èr十shí二èr了liǎo无wú显xiǎn证zhèng,而ér虚xū贬biǎn臣chén历lì乖guāi差chà半bàn次cì,此cǐ愚yú情qíng之zhī所suǒ骇hài也yě。又yòu年nián数shù之zhī余yú有yǒu十shí一yī月yuè,而ér议yì云yún九jiǔ月yuè,涉shè数shù每měi乖guāi,皆jiē此cǐ类lèi也yě。月yuè盈yíng则zé食shí,必bì在zài日rì冲chōng,以yǐ检jiǎn日rì则zé宿sù度dù可kě辨biàn,请qǐng据jù效xiào以yǐ课kè疏shū密mì。按àn太tài史shǐ注zhù记jì,元yuán嘉jiā十shí三sān年nián十shí二èr月yuè十shí六liù日rì中zhōng夜yè月yuè蚀shí尽jǐn,在zài鬼guǐ四sì度dù,以yǐ冲chōng计jì之zhī,日rì当dāng在zài牛niú六liù。依yī法fǎ兴xīng议yì:“在zài女nǚ七qī”。又yòu十shí四sì年nián五wǔ月yuè十shí五wǔ日rì丁dīng夜yè月yuè蚀shí尽jǐn,在zài斗dòu二èr十shí六liù度dù,以yǐ冲chōng计jì之zhī,日rì当dāng在zài井jǐng三sān十shí,依yī法fǎ兴xīng议yì曰yuē:“日rì在zài柳liǔ二èr。”又yòu二èr十shí八bā年nián八bā月yuè十shí五wǔ日rì丁dīng夜yè月yuè蚀shí,在zài奎kuí十shí一yí度dù,以yǐ冲chōng计jì之zhī,日rì当dāng在zài角jiǎo二èr;依yī法fǎ兴xīng议yì曰yuē:“日rì在zài角jiǎo十shí二èr。”又yòu大dà明míng三sān年nián九jiǔ月yuè十shí五wǔ日rì乙yǐ夜yè月yuè蚀shí尽jǐn,在zài胃wèi宿sù之zhī末mò,以yǐ冲chōng计jì之zhī,日rì当dāng在zài氐dī十shí二èr;依yī法fǎ兴xīng议yì曰yuē:“日rì在zài心xīn二èr。”凡fán此cǐ四sì蚀shí,皆jiē与yǔ臣chén法fǎ符fú同tóng,纤xiān毫háo不bù爽shuǎng,而ér法fǎ兴xīng所suǒ据jù,顿dùn差chà十shí度dù,违wéi冲chōng移yí宿sù,显xiǎn然rán易yì睹dǔ。故gù知zhī天tiān数shù渐jiàn差chà,则zé当dāng式shì遵zūn以yǐ为wéi典diǎn,事shì验yàn昭zhāo晰xī,岂qǐ得dé信xìn古gǔ而ér疑yí今jīn。

法fǎ兴xīng议yì曰yuē:“在zài《诗shī》‘七qī月yuè流liú火huǒ’,此cǐ夏xià正zhèng建jiàn申shēn之zhī时shí也yě。‘定dìng之zhī方fāng中zhōng’,又yòu小xiǎo雪xuě之zhī节jié也yě。若ruò冬dōng至zhì审shěn差chà,则zé豳bīn公gōng火huǒ流liú,晷guǐ长zhǎng一yī尺chǐ五wǔ寸cùn,楚chǔ宫gōng之zhī作zuò,昼zhòu漏lòu五wǔ十shí三sān刻kè,此cǐ诡guǐ之zhī甚shèn也yě。”冲chōng之zhī曰yuē:臣chén按àn此cǐ议yì三sān条tiáo皆jiē谬miù。《诗shī》称chēng流liú火huǒ,盖gài略lüè举jǔ西xī移yí之zhī中zhōng,以yǐ为wéi惊jīng寒hán之zhī候hòu。流liú之zhī为wèi言yán,非fēi始shǐ动dòng之zhī辞cí也yě。就jiù如rú始shǐ说shuō,冬dōng至zhì日rì度dù在zài斗dòu二èr十shí二èr,则zé火huǒ星xīng之zhī中zhōng,当dāng在zài大dà暑shǔ之zhī前qián,岂qǐ邻lín建jiàn申shēn之zhī限xiàn。此cǐ专zhuān自zì攻gōng纠jiū,非fēi谓wèi矫jiǎo失shī。《夏xià小xiǎo正zhèng》:“五wǔ月yuè昏hūn,大dà火huǒ中zhōng。”此cǐ复fù在zài卫wèi阳yáng之zhī地dì乎hū?又yòu谓wèi臣chén所suǒ立lì法fǎ,楚chǔ宫gōng之zhī作zuò,在zài九jiǔ月yuè初chū。按àn《诗shī》传chuán笺jiān皆jiē谓wèi定dìng之zhī方fāng中zhōng者zhě,室shì辟pì昏hūn中zhōng,形xíng四sì方fāng也yě。然rán则zé中zhōng天tiān之zhī正zhèng,当dāng在zài室shì之zhī八bā度dù。臣chén历lì推tuī之zhī,元yuán年nián立lì冬dōng后hòu四sì日rì,此cǐ度dù昏hūn中zhōng,乃nǎi处chù十shí月yuè之zhī初chū,又yòu非fēi寒hán露lù之zhī日rì也yě。议yì者zhě之zhī意yì,盖gài误wù以yǐ周zhōu世shì为wèi尧yáo时shí,度dù差chà五wǔ十shí,故gù致zhì此cǐ谬miù。小xiǎo雪xuě之zhī节jié,自zì信xìn之zhī谈tán,非fēi有yǒu明míng文wén可kě据jù也yě。

法fǎ兴xīng议yì曰yuē:“仲zhòng尼ní曰yuē:‘丘qiū闻wén之zhī,火huǒ伏fú而ér后hòu蛰zhé者zhě毕bì。今jīn火huǒ犹yóu西xī流liú,司sī历lì过guò也yě。’就jiù如rú冲chōng之zhī所suǒ误wù,则zé星xīng无wú定dìng次cì,卦guà有yǒu差chà方fāng,名míng号hào之zhī正zhèng,古gǔ今jīn必bì殊shū,典diǎn诰gào之zhī音yīn,时shí不bù通tōng轨guǐ。尧yáo之zhī开kāi、闭bì,今jīn成chéng建jiàn、除chú,今jīn之zhī寿shòu星xīng,乃nǎi周zhōu之zhī鹑chún尾wěi也yě。即jí时shí东dōng壁bì,已yǐ非fēi玄xuán武wǔ,轸zhěn星xīng顿dùn属shǔ苍cāng龙lóng,诬wū天tiān背bèi经jīng,乃nǎi至zhì于yú此cǐ。”冲chōng之zhī曰yuē:臣chén以yǐ为wéi辰chén极jí居jū中zhōng,而ér列liè曜yào贞zhēn观guàn,群qún像xiàng殊shū体tǐ,而ér阴yīn阳yáng区qū别bié,故gù羽yǔ介jiè咸xián陈chén,则zé水shuǐ火huǒ有yǒu位wèi,苍cāng素sù齐qí设shè,则zé东dōng西xī可kě准zhǔn,非fēi以yǐ日rì之zhī所suǒ在zài,定dìng其qí名míng号hào也yě。何hé以yǐ明míng之zhī?夫fū阳yáng爻yáo初chū九jiǔ,气qì始shǐ正zhèng北běi,玄xuán武wǔ七qī列liè,虚xū当dāng子zǐ位wèi。若ruò圆yuán仪yí辨biàn方fāng,以yǐ日rì为wéi主zhǔ,冬dōng至zhì所suǒ舍shě,当dāng在zài玄xuán枵xiāo;而ér今jīn之zhī南nán极jí,乃nǎi处chù东dōng维wéi,违wéi体tǐ失shī中zhōng,其qí义yì何hé附fù。若ruò南nán北běi以yǐ冬dōng夏xià禀bǐng称chēng,则zé卯mǎo酉yǒu以yǐ生shēng杀shā定dìng号hào,岂qǐ得dé春chūn躔chán义yì方fāng,秋qiū丽lì仁rén域yù,名míng舛chuǎn理lǐ乖guāi,若ruò此cǐ之zhī反fǎn哉zāi!因yīn兹zī以yǐ言yán,因yīn知zhī天tiān以yǐ列liè宿sù分fēn方fāng,而ér不bù在zài于yú四sì时shí,景jǐng纬wěi环huán序xù,日rì不bù独dú守shǒu故gù辙zhé矣yǐ。至zhì于yú中zhōng星xīng见jiàn伏fú,记jì籍jí每měi以yǐ审shěn时shí者zhě,盖gài以yǐ历lì数shù难nán详xiáng,而ér天tiān验yàn易yì显xiǎn,各gè据jù一yí代dài所suǒ合hé,以yǐ为wéi简jiǎn易yì之zhī政zhèng也yě。亦yì犹yóu夏xià礼lǐ未wèi通tōng商shāng典diǎn,《濩huò》容róng岂qǐ袭xí《韶sháo》节jié,诚chéng天tiān人rén之zhī道dào同tóng差chà,则zé艺yì之zhī兴xīng,因yīn代dài而ér推tuī移yí矣yǐ。月yuè位wèi称chēng建jiàn,谅liàng以yǐ气qì之zhī所suǒ本běn,名míng随suí实shí著zhù,非fēi谓wèi斗dòu杓biāo所suǒ指zhǐ。近jìn校xiào汉hàn时shí,已yǐ差chà半bàn次cì,审shěn斗dòu节jié时shí,其qí效xiào安ān在zài。或huò义yì非fēi经jīng训xùn,依yī以yǐ成chéng说shuō,将jiāng纬wěi候hòu多duō诡guǐ,伪wěi辞cí间jiān设shè乎hū?次cì随suí方fāng名míng,义yì合hé宿sù体tǐ。分fēn至zhì虽suī迁qiān,而ér厥jué位wèi不bù改gǎi,岂qǐ谓wèi龙lóng火huǒ贸mào处chù,金jīn水shuǐ乱luàn列liè,名míng号hào乖guāi殊shū之zhī讥jī,抑yì未wèi详xiáng究jiū。至zhì如rú壁bì非fēi玄xuán武wǔ,轸zhěn属shǔ苍cāng龙lóng,瞻zhān度dù察chá晷guǐ,实shí效xiào咸xián然rán。《元yuán嘉jiā历lì法fǎ》,寿shòu星xīng之zhī初chū,亦yì在zài翼yì限xiàn,参cān校jiào晋jìn注zhù,显xiǎn验yàn甚shèn众zhòng。天tiān数shù差chà移yí,百bǎi有yǒu余yú载zài,议yì者zhě诚chéng能néng驰chí辞cí骋chěng辩biàn,令lìng南nán极jí非fēi冬dōng至zhì,望wàng不bù在zài冲chōng,则zé此cǐ谈tán乃nǎi可kě守shǒu耳ěr。若ruò使shǐ日rì迁qiān次cì留liú,则zé无wú事shì屡lǚ嫌xián,乃nǎi臣chén历lì之zhī良liáng证zhèng,非fēi难nàn者zhě所suǒ宜yí列liè也yě。寻xún臣chén所suǒ执zhí,必bì据jù经jīng史shǐ,远yuǎn考kǎo唐táng典diǎn,近jìn征zhēng汉hàn籍jí,谶chèn记jì碎suì言yán,不bù敢gǎn依yī述shù,窃qiè谓wèi循xún经jīng之zhī论lùn也yě。月yuè蚀shí检jiǎn日rì度dù,事shì验yàn昭zhāo著zhù,史shǐ注zhù详xiáng论lùn,文wén存cún禁jìn阁gé,斯sī又yòu稽jī天tiān之zhī说shuō也yě。《尧yáo典diǎn》四sì星xīng,并bìng在zài卫wèi阳yáng,今jīn之zhī日rì度dù,远yuǎn淮huái元yuán和hé,诬wū背bèi之zhī诮qiào,实shí此cǐ之zhī谓wèi。

法fǎ兴xīng议yì曰yuē:“夫fū日rì有yǒu缓huǎn急jí,故gù斗dòu有yǒu阔kuò狭xiá,古gǔ人rén制zhì章zhāng,立lì为wèi中zhōng格gé,年nián积jī十shí九jiǔ,常cháng有yǒu七qī闰rùn,晷guǐ或huò盈yíng虚xū,此cǐ不bù可kě革gé。冲chōng之zhī削xuē闰rùn坏huài章zhāng,倍bèi减jiǎn余yú数shù,则zé一yì百bǎi三sān十shí九jiǔ年nián二èr月yuè,于yú四sì分fēn之zhī科kē,顿dùn少shǎo一yī日rì;七qī千qiān四sì百bǎi二èr十shí九jiǔ年nián,辄zhé失shī一yī闰rùn。夫fū日rì少shǎo则zé先xiān时shí,闰rùn失shī则zé事shì悖bèi。窃qiè闻wén时shí以yǐ作zuò事shì,事shì以yǐ厚hòu生shēng,此cǐ乃nǎi生shēng民mín之zhī所suǒ本běn,历lì数shù之zhī所suǒ先xiān。愚yú恐kǒng非fēi冲chōng之zhī浅qiǎn虑lǜ,妄wàng可kě穿chuān凿záo。”冲chōng之zhī曰yuē:按àn《后hòu汉hàn书shū》及jí《乾qián象xiàng说shuō》,《四sì分fēn历lì法fǎ》,虽suī分fēn章zhāng设shè篰bù创chuàng自zì元yuán和hé,而ér晷guǐ仪yí众zhòng数shù定dìng于yú嘉jiā平píng三sān年nián。《四sì分fēn志zhì》,立lì冬dōng中zhōng影yǐng长zhǎng一yī丈zhàng,立lì春chūn中zhōng影yǐng九jiǔ尺chǐ六liù寸cùn。寻xún冬dōng至zhì南nán极jí,日rì晷guǐ最zuì长zhǎng,二èr气qì去qù至zhì,日rì数shù既jì同tóng,则zé中zhōng影yǐng应yīng等děng,而ér前qián长zhǎng后hòu短duǎn,顿dùn差chà四sì寸cùn,此cǐ历lì景jǐng冬dōng至zhì后hòu天tiān之zhī验yàn也yě。二èr气qì中zhōng影yǐng,日rì差chà九jiǔ分fēn半bàn弱ruò,进jìn退tuì均jūn调diào,略lüè无wú盈yíng缩suō。以yǐ率lǜ计jì之zhī,二èr气qì各gè退tuì二èr日rì十shí二èr刻kè,则zé晷guǐ影yǐng之zhī数shù,立lì冬dōng更gèng短duǎn,立lì春chūn更gèng长zhǎng,并bìng差chà二èr寸cùn,二èr气qì中zhōng影yǐng俱jù长zhǎng九jiǔ尺chǐ八bā寸cùn矣yǐ。即jí立lì冬dōng、立lì春chūn之zhī正zhèng日rì也yě。以yǐ此cǐ推tuī之zhī,历lì置zhì冬dōng至zhì,后hòu天tiān亦yì二èr日rì十shí二èr刻kè也yě。嘉jiā平píng三sān年nián,时shí历lì丁dīng丑chǒu冬dōng至zhì,加jiā时shí正zhèng在zài日rì中zhōng。以yǐ二èr日rì十shí二èr刻kè减jiǎn之zhī,天tiān定dìng以yǐ乙yǐ亥hài冬dōng至zhì,加jiā时shí在zài夜yè半bàn后hòu三sān十shí八bā刻kè。又yòu臣chén测cè景jǐng历lì纪jì,躬gōng辨biàn分fēn寸cùn,铜tóng表biǎo坚jiān刚gāng,暴bào润rùn不bù动dòng,光guāng晷guǐ明míng洁jié,纤xiān毫háo尽jìn然rán。据jù大dà明míng五wǔ年nián十shí月yuè十shí日rì,影yǐng一yī丈zhàng七qī寸cùn七qī分fēn半bàn,十shí一yī月yuè二èr十shí五wǔ日rì,一yī丈zhàng八bā寸cùn一yī分fēn太tài,二èr十shí六liù日rì,一yī丈zhàng七qī寸cùn五wǔ分fēn强qiáng,折zhé取qǔ其qí中zhōng,则zé中zhōng天tiān冬dōng至zhì,应yīng在zài十shí一yī月yuè三sān日rì。求qiú其qí蚤zǎo晚wǎn,令lìng后hòu二èr日rì影yǐng相xiāng减jiǎn,则zé一yī日rì差chà率lǜ也yě。倍bèi之zhī为wèi法fǎ,前qián二èr日rì减jiǎn,以yǐ百bǎi刻kè乘chéng之zhī为wèi实shí,以yǐ法fǎ除chú实shí,得dé冬dōng至zhì加jiā时shí在zài夜yè半bàn后hòu三sān十shí一yī刻kè,在zài《元yuán嘉jiā历lì》后hòu一yī日rì,天tiān数shù之zhī正zhèng也yě。量liàng检jiǎn竟jìng年nián,则zé数shù减jiǎn均jūn同tóng,异yì岁suì相xiāng课kè,则zé远yuǎn近jìn应yīng率lǜ。臣chén因yīn此cǐ验yàn,考kǎo正zhèng章zhāng法fǎ。今jīn以yǐ臣chén历lì推tuī之zhī,刻kè如rú前qián,窃qiè谓wèi至zhì密mì,永yǒng为wèi定dìng式shì。寻xún古gǔ历lì法fǎ并bìng同tóng《四sì分fēn》,《四sì分fēn》之zhī数shù久jiǔ则zé后hòu天tiān,经jīng三sān百bǎi年nián,朔shuò差chà一yī日rì。是shì以yǐ汉hàn载zài四sì百bǎi,食shí率lǜ在zài晦huì。魏wèi代dài已yǐ来lái,遂suì革gé斯sī法fǎ,世shì莫mò之zhī非fēi者zhě,诚chéng有yǒu效xiào于yú天tiān也yě。章zhāng岁suì十shí九jiǔ,其qí疏shū尤yóu甚shèn,同tóng出chū前qián术shù,非fēi见jiàn经jīng典diǎn。而ér议yì云yún此cǐ法fǎ自zì古gǔ,数shù不bù可kě移yí。若ruò古gǔ法fǎ虽suī疏shū,永yǒng当dāng循xún用yòng,谬miù论lùn诚chéng立lì,则zé法fǎ兴xīng复fù欲yù施shī《四sì分fēn》于yú当dāng今jīn矣yǐ,理lǐ容róng然rán乎hū?臣chén所suǒ未wèi譬pì也yě。若ruò谓wèi今jīn所suǒ革gé创chuàng违wéi舛chuǎn失shī衷zhōng者zhě,未wèi闻wén显xiǎn据jù有yǒu以yǐ矫jiǎo夺duó臣chén法fǎ也yě。《元yuán嘉jiā历lì》术shù,减jiǎn闰rùn余yú二èr,直zhí以yǐ袭xí旧jiù分fēn粗cū,故gù进jìn退tuì未wèi合hé。至zhì于yú弃qì盈yíng求qiú正zhèng,非fēi为wèi乖guāi理lǐ。就jiù如rú议yì意yì,率lǜ不bù可kě易yì,则zé分fēn无wú增zēng损sǔn,承chéng天tiān置zhì法fǎ,复fù为wèi违wéi谬miù。节jié气qì蚤zǎo晚wǎn,当dāng循xún《景jǐng初chū》,二èr至zhì差chà三sān日rì,曾céng不bù觉jué其qí非fēi,横héng谓wèi臣chén历lì为wèi失shī,知zhī日rì少shǎo之zhī先xiān时shí,未wèi悟wù增zēng月yuè甚shèn惑huò也yě。诚chéng未wèi睹dǔ天tiān验yàn,岂qǐ测cè历lì数shù之zhī要yào,生shēng民mín之zhī本běn,谅liàng非fēi率lǜ意yì所suǒ断duàn矣yǐ。又yòu法fǎ兴xīng始shǐ云yún穷qióng识shí晷guǐ变biàn,可kě以yǐ刊kān旧jiù革gé今jīn,复fù谓wèi晷guǐ数shù盈yíng虚xū,不bù可kě为wèi准zhǔn,互hù自zì违wéi伐fá,罔wǎng识shí所suǒ依yī。若ruò推tuī步bù不bù得dé准zhǔn,天tiān功gōng绝jué于yú心xīn目mù,未wèi详xiáng历lì纪jì何hé因yīn而ér立lì。案àn《春chūn秋qiū》以yǐ来lái千qiān有yǒu余yú载zài,以yǐ食shí检jiǎn朔shuò,曾céng无wú差chà失shī,此cǐ则zé日rì行xíng有yǒu恆héng之zhī明míng征zhēng也yě。且qiě臣chén考kǎo影yǐng弥mí年nián,穷qióng察chá毫háo微wēi,课kè验yàn以yǐ前qián,合hé若ruò符fú契qì,孟mèng子zi以yǐ为wéi千qiān岁suì之zhī日rì至zhì,可kě坐zuò而ér知zhī,斯sī言yán实shí矣yǐ。日rì有yǒu缓huǎn急jí,未wèi见jiàn其qí证zhèng,浮fú辞cí虚xū贬biǎn,窃qiè非fēi所suǒ惧jù。

法fǎ兴xīng议yì曰yuē:“冲chōng之zhī既jì云yún冬dōng至zhì岁suì差chà,又yòu谓wèi虚xū为wèi北běi中zhōng,舍shě形xíng责zé影yǐng,未wèi足zú为wèi迷mí。何hé者zhě?凡fán在zài天tiān非fēi日rì不bù明míng,居jū地dì以yǐ斗dòu而ér辨biàn,借jiè令lìng冬dōng至zhì在zài虚xū,则zé黄huáng道dào弥mí远yuǎn,东dōng北běi当dāng为wèi黄huáng钟zhōng之zhī宫gōng,室shì壁bì应yīng属shǔ玄xuán枵xiāo之zhī位wèi,虚xū宿sù岂qǐ得dé复fù为wèi北běi中zhōng乎hū?曲qū使shǐ分fēn至zhì屡lǚ迁qiān,而ér星xīng次cì不bù改gǎi,招zhāo摇yáo易yì绳shéng,而ér律lǜ吕lǚ仍réng往wǎng,则zé七qī政zhèng不bù以yǐ玑jī衡héng致zhì齐qí,建jiàn时shí亦yì非fēi摄shè提tí所suǒ纪jì,不bù知zhī五wǔ行xíng何hé居jū,六liù属shǔ安ān托tuō。”冲chōng之zhī曰yuē:此cǐ条tiáo所suǒ嫌xián,前qián牒dié已yǐ详xiáng。次cì改gǎi方fāng移yí,虚xū非fēi中zhōng位wèi,繁fán辞cí广guǎng证zhèng,自zì构gòu纷fēn惑huò,皆jiē议yì者zhě所suǒ谬miù误wù,非fēi臣chén法fǎ之zhī违wéi设shè也yě。七qī政zhèng致zhì齐qí,实shí谓wèi天tiān仪yí,郑zhèng、王wáng唱chàng述shù,厥jué训xùn明míng允yǔn,虽suī有yǒu异yì说shuō,盖gài非fēi实shí义yì。

法fǎ兴xīng议yì曰yuē:“夫fū置zhì元yuán设shè纪jì,各gè有yǒu所suǒ尚shàng,或huò据jù文wén于yú图tú谶chèn,或huò取qǔ效xiào于yú当dāng时shí。冲chōng之zhī云yún‘群qún氏shì纠jiū纷fēn,莫mò审shěn其qí会huì。’昔xī《黄huáng帝dì》辛xīn卯mǎo,日rì月yuè不bù过guò,《颛zhuān顼xū》乙yǐ卯mǎo,四sì时shí不bù忒tè,《景jǐng初chū》壬rén辰chén,晦huì无wú差chà光guāng,《元yuán嘉jiā》庚gēng辰chén,朔shuò无wú错cuò景jǐng,岂qǐ非fēi承chéng天tiān者zhě乎hū?冲chōng之zhī苟gǒu存cún甲jiǎ子zi,可kě谓wèi为wèi合hé以yǐ求qiú天tiān也yě。”冲chōng之zhī曰yuē:夫fū历lì存cún效xiào密mì,不bù容róng殊shū尚shàng,合hé谶chèn乖guāi说shuō,训xùn义yì非fēi所suǒ取qǔ,虽suī验yàn当dāng时shí,不bù能néng通tōng远yuǎn,又yòu臣chén所suǒ未wèi安ān也yě。元yuán值zhí始shǐ名míng,体tǐ明míng理lǐ正zhèng。未wèi详xiáng辛xīn卯mǎo之zhī说shuō何hé依yī,古gǔ术shù诡guǐ谬miù,事shì在zài前qián牒dié,溺nì名míng丧sàng实shí,殆dài非fēi索suǒ隐yǐn之zhī谓wèi也yě。若ruò以yǐ历lì合hé一yī时shí,理lǐ无wú久jiǔ用yòng,元yuán在zài所suǒ会huì,非fēi有yǒu定dìng岁suì者zhě,今jīn以yǐ效xiào明míng之zhī。夏xià、殷yīn以yǐ前qián,载zài籍jí沦lún逸yì,《春chūn秋qiū》汉hàn史shǐ,咸xián书shū日rì蚀shí,正zhēng朔shuò详xiáng审shěn,显xiǎn然rán可kě徵zhēng。以yǐ臣chén历lì检jiǎn之zhī,数shù皆jiē协xié同tóng,诚chéng无wú虚xū设shè,循xún密mì而ér至zhì,千qiān载zài无wú殊shū,则zé虽suī远yuǎn知zhī矣yǐ。备bèi阅yuè曩nǎng法fǎ,疏shū越yuè实shí多duō,或huò朔shuò差chà三sān日rì,气qì移yí七qī晨chén,未wèi闻wén可kě以yǐ下xià通tōng于yú今jīn者zhě也yě。元yuán在zài乙yǐ丑chǒu,前qián说shuō以yǐ为wéi非fēi正zhèng,今jīn值zhí甲jiǎ子zi,议yì者zhě复fù疑yí其qí苟gǒu合hé,无wú名míng之zhī岁suì,自zì昔xī无wú之zhī,则zé推tuī先xiān者zhě,将jiāng何hé从cóng乎hū?历lì纪jì之zhī作zuò,几jǐ于yú息xī矣yǐ。夫fū为wèi合hé必bì有yǒu不bù合hé,愿yuàn闻wén显xiǎn据jù,以yǐ核hé理lǐ实shí。

法fǎ兴xīng曰yuē:“夫fū交jiāo会huì之zhī元yuán,则zé蚀shí既jì可kě求qiú,迟chí疾jí之zhī际jì,非fēi凡fán夫fū所suǒ测cè。昔xī贾jiǎ逵kuí略lüè见jiàn其qí差chà,刘liú洪hóng粗cū著zhù其qí术shù,至zhì于yú疏shū密mì之zhī数shù,莫mò究jiū其qí极jí。且qiě五wǔ纬wěi所suǒ居jū,有yǒu时shí盈yíng缩suō,即jí如rú岁suì星xīng在zài轸zhěn,见jiàn超chāo七qī辰chén,术shù家jiā既jì追zhuī算suàn以yǐ会huì今jīn,则zé往wǎng之zhī与yǔ来lái,断duàn可kě知zhī矣yǐ。《景jǐng初chū》所suǒ以yǐ纪jì首shǒu置zhì差chà,《元yuán嘉jiā》兼jiān又yòu各gè设shè后hòu元yuán者zhě,其qí并bìng省shěng功gōng于yú实shí用yòng,不bù虚xū推tuī以yǐ为wéi烦fán也yě。冲chōng之zhī既jì违wéi天tiān于yú改gǎi易yì,又yòu设shè法fǎ以yǐ遂suì情qíng,愚yú谓wèi此cǐ治zhì历lì之zhī大dà过guò也yě。”冲chōng之zhī曰yuē:迟chí疾jí之zhī率lǜ,非fēi出chū神shén怪guài,有yǒu形xíng可kě检jiǎn,有yǒu数shù可kě推tuī,刘liú、贾jiǎ能néng述shù,则zé可kě累lèi功gōng以yǐ求qiú密mì矣yǐ。议yì又yòu云yún“五wǔ纬wěi所suǒ居jū,有yǒu时shí盈yíng缩suō”。“岁suì星xīng在zài轸zhěn,见jiàn超chāo七qī辰chén”。谓wèi应yīng年nián移yí一yī辰chén也yě。案àn岁suì星xīng之zhī运yùn,年nián恆héng过guò次cì,行xíng天tiān七qī匝zā,辄zhé超chāo一yī位wèi。代dài以yǐ求qiú之zhī,历lì凡fán十shí法fǎ,并bìng合hé一yī时shí,此cǐ数shù咸xián同tóng,史shǐ注zhù所suǒ记jì,天tiān验yàn又yòu符fú。此cǐ则zé盈yíng次cì之zhī行xíng,自zì其qí定dìng准zhǔn,非fēi为wèi衍yǎn度dù滥làn徙xǐ,顿dùn过guò其qí冲chōng也yě。若ruò审shěn由yóu盈yíng缩suō,岂qǐ得dé常cháng疾jí无wú迟chí。夫fū甄zhēn耀yào测cè象xiàng者zhě,必bì料liào分fēn析xī度dù,考kǎo往wǎng验yàn来lái,准zhǔn以yǐ实shí见jiàn,据jù以yǐ经jīng史shǐ。曲qū辩biàn碎suì说shuō,类lèi多duō浮fú诡guǐ,甘gān、石shí之zhī书shū,互hù为wéi矛máo盾dùn。今jīn以yǐ一yī句jù之zhī经jīng,诬wū一yī字zì之zhī谬miù,坚jiān执zhí偏piān论lùn,以yǐ罔wǎng正zhèng理lǐ,此cǐ愚yú情qíng之zhī所suǒ未wèi厌yàn也yě。算suàn自zì近jìn始shǐ,众zhòng法fǎ可kě同tóng,但dàn《景jǐng初chū》之zhī二èr差chà,承chéng天tiān之zhī后hòu元yuán,实shí以yǐ奇jī偶ǒu不bù协xié,故gù数shù无wú尽jìn同tóng,为wèi遗yí前qián设shè后hòu,以yǐ从cóng省shěng易yì。夫fū建jiàn言yán倡chàng论lùn,岂qǐ尚shàng矫jiǎo异yì,盖gài令lìng实shí以yǐ文wén显xiǎn,言yán势shì可kě极jí也yě。稽jī元yuán曩nǎng岁suì,群qún数shù咸xián始shǐ,斯sī诚chéng术shù体tǐ,理lǐ不bù可kě容róng讥jī;而ér讥jī者zhě以yǐ为wéi过guò,谬miù之zhī大dà者zhě。然rán则zé《元yuán嘉jiā》置zhì元yuán,虽suī七qī率lǜ舛chuǎn陈chén,而ér犹yóu纪jì协xié甲jiǎ子zi,气qì朔shuò俱jù终zhōng,此cǐ又yòu过guò谬miù之zhī小xiǎo者zhě也yě。必bì当dāng虚xū立lì上shàng元yuán,假jiǎ称chēng历lì始shǐ,岁suì违wéi名míng初chū,日rì避bì辰chén首shǒu,闰rùn余yú朔shuò分fēn,月yuè纬wěi七qī率lǜ,并bìng不bù得dé有yǒu尽jǐn,乃nǎi为wèi允yǔn衷zhōng之zhī制zhì乎hū?设shè法fǎ情qíng实shí,谓wèi意yì之zhī所suǒ安ān;改gǎi易yì违wéi天tiān,未wèi睹dǔ理lǐ之zhī讥jī者zhě也yě。

法fǎ兴xīng曰yuē:“日rì有yǒu八bā行xíng,合hé成chéng一yī道dào,月yuè有yǒu一yī道dào,离lí为wèi九jiǔ行xíng,左zuǒ交jiāo右yòu疾jí,倍bèi半bàn相xiāng违wéi,其qí一yī终zhōng之zhī理lǐ,日rì数shù宜yí同tóng。冲chōng之zhī通tōng同tóng与yù会huì周zhōu相xiāng觉jué九jiǔ千qiān四sì十shí,其qí阴yīn阳yáng七qī十shí九jiǔ周zhōu有yǒu奇qí,迟chí疾jí不bù及jí一yī匝zā,此cǐ则zé当dāng缩suō反fǎn盈yíng,应yīng损sǔn更gèng益yì。”冲chōng之zhī曰yuē:此cǐ议yì虽suī游yóu漫màn无wú据jù,然rán言yán迹jì可kě检jiǎn。按àn以yǐ日rì八bā行xíng譬pì月yuè九jiǔ道dào,此cǐ为wèi月yuè行xíng之zhī轨guǐ,当dāng循xún一yī辙zhé,环huán匝zā于yú天tiān,理lǐ无wú差chā动dòng也yě。然rán则zé交jiāo会huì之zhī际jì,当dāng有yǒu定dìng所suǒ,岂qǐ容róng或huò斗dòu或huò牛niú,同tóng丽lì一yí度dù。去qù极jí应yīng等děng,安ān得dé南nán北běi无wú常cháng。若ruò日rì月yuè非fēi例lì,则zé八bā行xíng之zhī说shuō是shì衍yǎn文wén邪xié?左zuǒ交jiāo右yòu疾jí,语yǔ甚shèn未wèi分fēn,为wèi交jiāo与yǔ疾jí对duì?为wèi舍shě交jiāo即jí疾jí?若ruò舍shě交jiāo即jí疾jí,即jí交jiāo在zài平píng率lǜ入rù历lì七qī日rì及jí二èr十shí一yī日rì是shì也yě。值zhí交jiāo蚀shí既jì当dāng在zài盈yíng缩suō之zhī极jí,岂qǐ得dé损sǔn益yì,或huò多duō或huò少shǎo。若ruò交jiāo与yǔ疾jí对duì,则zé在zài交jiāo之zhī冲chōng,当dāng为wèi迟chí疾jí之zhī始shǐ,岂qǐ得dé入rù历lì或huò深shēn或huò浅qiǎn,倍bèi半bàn相xiāng违wéi,新xīn故gù所suǒ同tóng,复fù摽biāo此cǐ句jù,欲yù以yǐ何hé明míng。臣chén览lǎn历lì书shū,古gǔ今jīn略lüè备bèi,至zhì如rú此cǐ说shuō,所suǒ未wèi前qián闻wén,远yuǎn乖guāi旧jiù准zhǔn,近jìn背bèi天tiān数shù,求qiú之zhī愚yú情qíng,窃qiè所suǒ深shēn惑huò。寻xún迟chí疾jí阴yīn阳yáng不bù相xiāng生shēng,故gù交jiāo会huì加jiā时shí,进jìn退tuì无wú常cháng,昔xī术shù著zhù之zhī久jiǔ矣yǐ,前qián儒rú言yán之zhī详xiáng矣yǐ。而ér法fǎ兴xīng云yún日rì数shù同tóng。窃qiè谓wèi议yì者zhě未wèi晓xiǎo此cǐ意yì,乖guāi谬miù自zì著zhù,无wú假jiǎ骤zhòu辩biàn,既jì云yún盈yíng缩suō失shī衷zhōng,复fù不bù备bèi记jì其qí数shù,或huò自zì嫌xián所suǒ执zhí,故gù泛fàn略lüè其qí说shuō乎hū?又yòu以yǐ全quán为wèi率lǜ,当dāng互hù因yīn其qí分fēn,法fǎ兴xīng所suǒ列liè二èr数shù皆jiē误wù,或huò以yǐ八bā十shí为wèi七qī十shí九jiǔ,当dāng缩suō反fǎn盈yíng,应yīng损sǔn更gèng益yì,此cǐ条tiáo之zhī谓wèi矣yǐ。总zǒng检jiǎn其qí议yì,岂qǐ但dàn臣chén历lì不bù密mì,又yòu谓wèi何hé承chéng天tiān法fǎ乖guāi谬miù弥mí甚shèn。若ruò臣chén历lì宜yí弃qì,则zé承chéng天tiān术shù益yì不bù可kě用yòng。法fǎ兴xīng所suǒ见jiàn既jì审shěn,则zé应yīng革gé创chuàng。至zhì非fēi景jǐng极jí,望wàng非fēi日rì冲chōng,凡fán诸zhū新xīn说shuō,必bì有yǒu妙miào辩biàn乎hū?

时shí法fǎ兴xīng为wèi世shì祖zǔ所suǒ宠chǒng,天tiān下xià畏wèi其qí权quán,既jì立lì异yì议yì,论lùn者zhě皆jiē附fù之zhī。唯wéi中zhōng书shū舍shě人rén巢cháo尚shàng之zhī是shì冲chōng之zhī之zhī术shù,执zhí据jù宜yí用yòng。上shàng爱ài奇qí慕mù古gǔ,欲yù用yòng冲chōng之zhī新xīn法fǎ,时shí大dà明míng八bā年nián也yě。故gù须xū明míng年nián改gǎi元yuán,因yīn此cǐ改gǎi历lì。未wèi及jí施shī用yòng,而ér宫gōng车chē晏yàn驾jià也yě。

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