Chinese visas are divided into diplomatic, courtesy, business, and ordinary visas. Ordinary visas are issued according to your purpose of visit. This includes the following:
L visa – Tourist visa
F visa – Study and cultural exchange visa
X visa – Student visa
Z visa – Teaching visa
G visa – Transit visa
C visa – Foreign crew members of various modes of transportation
J visa – Journalist visa
D visa – Permanent residency visa
In this case, Z visa, which is a teaching visa applies.