If you want to learn something, go to Borui. I applied for Borui in May this year. I don't know how the exam went, and the results haven't come down yet, but they spoke really well. The two classes take turns teaching. To tell you the truth, before signing up, I also looked for many organizations, such as Kai Nuo, trade unions, Beijing Post ... but I finally decided on Borui, where I really learned a lot.