How long does it take to book an American visa in Zhihu?

Generally, it is enough to make an appointment about ten working days in advance, and the materials should be prepared during the period. It's best not to arrange the time too tightly. One more thing, the time in Shanghai is rather turbulent. Unlike other embassies, the time is stable and sometimes it jumps a lot. If it is not arranged at the right time, you can spend more time.