requirement needed to do for extention when going to marry chinese citizen in china

You can apply for an extension. You hold a tourist L type currently, right? If yes, you can extend it and the first step is to prepare the required documents including your passport and copy of its data page, the completed application form affixed with a passport-style photo, temporary accommodation registration form and an invitation letter and Chinese ID card of your fiancé. And then submit the application to the exit and entry administration of the local to PSB to extend it.