2. There is no problem with the general teaching qualification of public institutions. If you want to inquire, you can directly ask the city and county education bureaus to which the school belongs, or you can inquire from the listed city and county education bureaus in official website.
3. If it is a private school, you can go to the higher authorities of the school for verification. For example, the higher authorities of technical colleges are laborers, and the higher authorities of schools with higher academic qualifications are educational institutions.