2 sentences for 子 (zǐ — viscount)

1. 孟子是战国时期的思想家。

   Mèng zǐ shì Zhàn​guó shí​qī de sī​xiǎng​jiā.

   Mencius was a thinker during the Warring States period.

   Source: Dong Chinese Dictionary

2. 在古代，‘子’是五等爵位中的第四等。

   zài gǔ​dài,‘zǐ’ shì wǔ děng jué​wèi zhōng de dì sì děng.

   In ancient times, 'zi' (Viscount) was the fourth of the five ranks of nobility.

   Source: Dong Chinese Dictionary