2 sentences

1. 面对不公的待遇，他决定据理抗争。

   miàn​duì bù​gōng de dài​yù, tā jué​dìng jù lǐ kàng​zhēng.

   Faced with unfair treatment, he decided to fight back with reason.

   Source: Dong Chinese Dictionary

2. 他在会议上据理力争，维护自己的权益。

   tā zài huì​yì shàng jù​lǐ​lì​zhēng, wéi​hù zì​jǐ de quán​yì.

   He argued his case strongly at the meeting to defend his rights.

   Source: Dong Chinese Dictionary