Why is the Vietnamese visa so slow?

Note: the Vietnamese tourist visa is due to the South China Sea arbitration case. Strictly control the examination and approval of Chinese mainland tourist applicants. Therefore, on the morning of 20 16-07-20, the consulate informed to recall all Vietnamese visa pages issued by 20 16-07-2 1. People who receive the information will also be affected, and the specific signing time is still uncertain. Therefore, all tourist visa categories in Vietnam are currently suspended. All other consulates in China are in the same situation.