Bayan ƙona littafin 212 BC, daular Han (202 BC<unk>220 AD) ta samar da ayyukan ilimin lissafi wanda wataƙila ya faɗaɗa kan ayyukan da aka ɓace yanzu. Mafi mahimmanci daga cikin waɗannan shi ne Fasali Tara kan Fasahar Ilimin lissafi, wanda cikakken taken ya bayyana a AD 179, amma ya wanzu a wani ɓangare a ƙarƙashin wasu taken kafin haka. Ya ƙunshi matsaloli 246 na kalma da suka shafi aikin gona, aiki, lissafin lissafi na lissafi zuwa tsawo da ƙididdigar rabo don pagoda na kasar Sin, aikin injiniya, da triangles.
A shekara ta 179 bayan haihuwar Yesu