I am a student studying at Guangzhou. I came back at 1st June for my holiday to my country. Do I need a visa to go back again as I have got a resident permit valid till 31 Oct 2010 (issued at 26th May) ? If visa is required, what documents do I need to submit with the visa application, as I do not have the JW 202 form (had to submit it for resident permit) ? And do I need to go for medical check- up again?