Hello! I have been to Shanghai last year for a vacation and I'm planning to come back this year. I just want to confirm that these are the requirements for visa renewal based on your website:

1. passport
2. visa application form with one colored photo with white background
3. round trip plane ticket
4. hotel reservation
5. old visa
6. photocopied emergency page

Also, how long is it going to take for the renewal to process? Thanks very much.