My advice to you is to go to Pingxiang or Dongxing. There are specialized Vietnamese language training institutions there. If you need a language environment. When you learn basic conversation and grammar in either of the above two places, you can pay a certain fee to your training institution and introduce you to work in a company in Vietnam, and then the invitation will be sent to you from there. Then you go to the public security bureau where you registered, and then you go to the Vietnamese embassy in Nanning to apply for a visa. Then you can start your trip to Vietnam. One can study while working, one can get the attention of Vietnamese MM in the company, and one can speak Vietnamese in China. This is not the best of both worlds. Ha ha.