The Z Visa supports employment. A Z Visa allows you to get payment and income from China, enables outbound monetary transfers and helps authorize your relatives to visit China for up to 180 days.

In addition to an invitation letter issued by the host entity, applicants for a Z Visa are also required to provide materials leading to a Chinese work permit. 

One thing to note: if you do not have a work permit, you are not allowed to get a Z Visa, or a residency permit. So please be sure of your purpose and how long you plan to stay before coming to China.