You signed up for the local Putonghua test. When your score reaches Grade One and Grade Two, you have to go to Beijing for a second interview. Only when you successfully pass the exam in Beijing will you be awarded a first-class and second-class certificate.
The reason for this is that the level of Putonghua test varies from place to place, and there are still many opaque places, and the level of One A and One B is very important. You must go to Beijing for a second interview.