First, if you choose a good school, you can visit the selected school a few days in advance. Although it costs more, it is better than learning nothing after paying the tuition.

Second: if you can't go on a field trip, you must know the school website in detail and analyze the students' works;

Third, compare word of mouth and price.

It is also important to compare the number of their students. The more students there are, the stronger the school is and the better the teaching quality is.