Hi, I have an unused still valid one entry visa to china and i will be going to shanghai this week. Due to unexpected reasons i will have to go to HK for 3 days next week after i have used the one time entry visa to go to shanghai and I like to find out if it is possible to re-enter china from HK (zhuhai for 3 days)after settling my business in HK. Can i apply for a new entry visa while i am in shanghai or do i have to apply when i am in HK?