I found it for my cousin. I filled out a form on the website this morning. In the evening, the staff called to recommend a suitable tutor. The staff also added WeChat and asked her about her study and personality in detail. The staff sent me five or six resumes of suitable tutors for me to choose from, and I auditioned for an hour for free. If I'm not satisfied, you can help me change it better. I feel very attentive, and my cousin has made great progress in one semester. As for the norms, it seems that there is a tutor website built by a group of teachers and students, and the real-name registration system for tutors is quite standardized.