2 sentences

1. 研读儒家经典是古代学子的必修课。

   yán​dú Rú​jiā jīng​diǎn shì gǔ​dài xué​zǐ de bì​xiū​kè.

   Studying Confucian classics was a mandatory course for ancient scholars.

   Source: Dong Chinese Dictionary

2. 加强党性锻炼是每个党员的必修课。

   jiā​qiáng dǎng​xìng duàn​liàn shì měi gè dǎng​yuán de bì​xiū​kè.

   Strengthening Party spirit is a compulsory task for every Party member.

   Source: Dong Chinese Dictionary