我在一家公司工作。

Wǒ zài yì jiā gōngsī gōngzuò.

I work at a company.

我明天要去公司开会。

Wǒ míngtiān yào qù gōngsī kāihuì.

I have to go to the company for a meeting tomorrow.

这家公司很大，有很多员工。

Zhè jiā gōngsī hěn dà, yǒu hěn duō yuángōng.

This company is big and has many employees.