3 sentences

1. 他已经在娱乐圈打拼多年了。

   tā yǐ​jīng zài yú​lè​quān dǎ​pīn duō nián le.

   He has been working in the entertainment industry for many years.

   Source: Dong Chinese Dictionary

2. 他在商界打拼多年，终于取得了成功。

   tā zài shāng​jiè dǎ​pīn duō nián, zhōng​yú qǔ​dé le chéng​gōng.

   After years of hard work in the business world, he finally achieved success.

   Source: Dong Chinese Dictionary

3. 他在政坛打拼多年，积累了丰富的人脉。

   tā zài zhèng​tán dǎ​pīn duō nián, jī​lěi le fēng​fù de rén​mài.

   Having worked in politics for many years, he has built an extensive network.

   Source: Dong Chinese Dictionary