I plan on going to China in October, visting Suzhou, Shanghai and Beijing as of now. I would require a single entry visa for these places? When I apply for a Chinese Visa do I have to leave my Canadian passport at the Chinese Visa Center for the processing time (7 days)? When in China, do I have to carry my passport with me all the time or can I carry a photocopy of the main page? I have not been to China before. Thank you.