4 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. 这种不公的待遇让他感到非常气愤。

   zhè zhǒng bù​gōng de dài​yù ràng tā gǎn​dào fēi​cháng qì​fèn.

   This unfair treatment made him very angry.

   Source: Dong Chinese Dictionary

3. 他至今仍对当年的不公待遇怀恨在心。

   tā zhì​jīn réng duì dāng​nián de bù​gōng dài​yù huái​hèn​zài​xīn.

   He still harbors a grudge over the unfair treatment he received years ago.

   Source: Dong Chinese Dictionary

4. 由于房屋拆迁补偿不公，他们决定向上级政府上访。

   yóu​yú fáng​wū chāi​qiān bǔ​cháng bù​gōng, tā​men jué​dìng xiàng shàng​jí zhèng​fǔ shàng​fǎng.

   Due to unfair compensation for the house demolition, they decided to petition the higher government.

   Source: Dong Chinese Dictionary