Noviro
周髀算经
Simplified 周髀算经
Traditional 周髀算經
Pinyin zhōu bì suàn jīng
Definition Zhou Bi Suan Jing, or Chou Pei Suan Ching, one of the oldest Chinese texts on astronomy and mathematics
在读周髀算经
Wǒ zài dú zhōu bì suàn jīng
I'm reading the Zhou Bi Suan Jing