Hi. Me and my two sisters are going to xiamen to visit another sister on october. Our sister, who is working in Xiamen will be providing our accomodation during our stay there. Since we are travelling as a group, do we all need to present a bank certificate/original passbook? Or will one bank certificate be sufficient for the three of us? This is our first time to apply for a visa and we're really not sure on what we should do. Your help will be greatly appreciated.