i want to get visa to guangzhou what i need to bring?how long can i get the visa?

If you go there for sightseeing purpose, you need to apply for a tourist L visa first by providing your passport and copy of its data page, the application form attached with a passport-style photo, round trip air tickets and hotel booking record, as well as proof of your financial support.
Usually, 4 working days are needed to process your application after you submit it.