Those who want to join primary and secondary education can check online. If you can find a reliable website, you can fill in your contact information on the website, and then you can get a copy of the joining information of primary and secondary education, including cooperation methods, cooperation policies, business models and so on.

Before joining, you can investigate a local market, that is, a local demand for supplementary education in primary and secondary schools, and then you can understand the feasibility of joining local primary and secondary education. Then, if possible, you can collect investors' joining intentions at the headquarters of this website.

Moreover, the headquarters will do an audit on itself, and you can join after passing the audit, so the above is a way for primary and secondary education to join.