Then, you have to have the road test to get your G2 license. Normally, you can make a test appointment in the day 2 or 3 months later after your phone call. You can get your G2 license as soon as you pass the road test. The G2 license allows you driving along.
The road test for G license includes highway-driving test. If you have your drive license in China for over 2 years, you can have your road test for G license after having G1 license. If not, you have to wait another one year after having your G2 license.