i am a gambian who like to visit china, how can i apply for a visa

Alieu, if you go there for tourism purpose, a tourist L type is needed. You should first prepare the required documents including the completed application form attached with a passport-style photo, your passport and copy of its data page, round trip air tickets, your valid entry permit to Senegal, and the accommodation reservation as well as proof of your financial support. And then submit your application to the embassy to apply for it.