There are three types of insurance research, namely, capital preservation department, inter-department communication (capital preservation to external schools) and extrapolation method (capital preservation to external schools). Generally speaking, there are many departments of capital preservation, followed by extrapolation (because the main reason for this pursuit is that foreign schools will charge you money), and the communication between departments is the least.

If you want to apply for graduate students from other schools, each school should be different. You should look at the recommendation requirements of the test-free schools. Every school is different. Generally, it is not until the senior year that schools begin to apply for graduate students. At this time, the websites of various schools will have very detailed explanations. Generally speaking, you need to obtain the extrapolation qualification of our school first, and send some filled-in forms (all from the website of the school you want to apply for), transcripts (stamped), letters of recommendation (this is not necessarily required by all schools, depending on the school) and various awards (photocopies will do) to the school you want to apply for. If they are satisfied, they will inform you of the interview, and many schools also have written tests. The results will come out in about 10 (anyway, I will tell you whether the extrapolation is successful or not before the postgraduate entrance examination, which will not affect the normal application). There is still plenty of time, so you can contact your favorite school first. Or if you still don't understand, you can refer to this.