What driver's license can I use for a bus with a seat of 17?

B 1 driver's license is a medium-sized bus (including city buses above 10 and below 19), and drivers can also drive C 1, C2, C3, C4 and M.

Extended data:

A 1 driver's license is a large bus. You can also drive A3, B 1, B2, C 1, C2, C3, C4 and M.

A2 driver's license is a tractor, and he can also drive B 1, B2, C 1, C2, C3, C4, M.

The A3 driver's license is a city bus (a city bus with passengers above 10), and you can also drive CC 1, C2, C3 and C4.

B2 driver's license is a big truck, and you can also drive C 1, C2, C3, C4, M.

References:

Baidu Encyclopedia-People's Republic of China (PRC) and China Motor Vehicle Driving License