做生意不容易。

Zuò shēngyì bù róngyì.

Doing business isn't easy.

他做生意很多年了，经验很丰富。

Tā zuò shēngyì hěn duō nián le, jīngyàn hěn fēngfù.

He has been doing business for many years and has a lot of experience.

他尝试建立自己的生意。

Tā chángshì jiànlì zìjǐ de shēngyì.

He tried setting up his own business.