I want to apply China visa urgently. I planning go to Shanghai on 16th May 2017 but only 3 days

Hi, if you visit China for sightseeing, you should apply for a tourist L type for that.
First, you need to provide a filled-out application form affixed with a passport-style photo, your passport and its photocopy, round trip air tickets and hotel reservation.
Next, submit the application to the CVASC.