According to the agreement signed by the United States and China to extend the validity of visas, since November 2016, all passport holders of the People's Republic of China who hold 10-year B1, B2 or B1/B2 visas need to update their personal data and other information on their visa application through websites every two years or when they obtain a new passport (whichever happens first). Information. This mechanism we call EVUS - Visa update electronic system. You need not take any action before the EVUS online update system is released in November 2016. In the coming year, the Department of Homeland Security, Customs and Border Protection (CBP) will keep visa holders informed of the latest information.