The written test is a professional course, usually English, and there are some relatively simple knowledge. Just be prepared. In fact, the second interview mainly examines the comprehensive quality of candidates.
The second interview is an upgraded version of the initial test. Everything is big and empty, and you won't ask a detailed question. Remember to fill in all the questions whether you like it or not. Generally speaking, as long as you enter the second interview, it will not be too difficult to write some schools.