It is recommended to choose a formal institution with the qualification to study abroad. At present, the industry in Shenzhen is chaotic, and there are too many small companies. There are nearly dozens, but only a few are legal. You can check this on the foreign website of the Ministry of Education. However, these formal institutions do less than three well, and they have a good reputation in Shenzhen. I feel that Hualian Education is OK. It is a company registered in Shenzhen and a subsidiary of Hualian Development Group. The strength of the company should not be underestimated. There is a one-stop service here, from training, examination, application for studying abroad to visa. Most of the teachers here are full-time and responsible, and many foreign teachers work part-time. You can think about it. In addition, there are some branch schools in Shenzhen, which are ok, but many teachers come to class temporarily or on business trips, and they feel uneasy. In addition, there is another institution in Nanshan, and the market is doing well.