3 sentences

1. 他在商界有广泛的交际。

   tā zài shāng​jiè yǒu guǎng​fàn de jiāo​jì.

   He has extensive social contacts in the business world.

   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. 他是个很有野心的年轻人，渴望在商界出人头地。

   tā shì gè hěn yǒu yě​xīn de nián​qīng​rén, kě​wàng zài shāng​jiè chū​rén​tóu​dì.

   He is an ambitious young man who is eager to make a name for himself in business.

   Source: Dong Chinese Dictionary