2. Judge the environment, whether the transportation at the class place is convenient, and understand the accommodation environment if classes are closed;

3. Teachers, large training institutions will have independent research and development, and full-time teachers will replace part-time jobs;

4. Course audition, you can choose online school, 19 classroom online audition, or consult the local branch school whether there is audition service;

5. Refund, the conditions and amount of refund of consulting institutions, especially the number of flights with full refund. The looser the conditions, the stronger the training institutions.