Im srilankan, and my husband works in shanghai, how to get tourist visa?

Hi there! You go there to visit your husband, right? If so, you can apply for a spouse S type.
The required documents include the filled-out application form attached with a passport-style photo, your passport and copy of its data page, an invitation letter from your husband, the copy of your husband’s passport and residence permit, as well as your marriage certificate (original and copy). And then hand in your application to the consulate general of PRC to apply for it.