Yes, they are used a lot. Sometimes a whole station will be empty, but they have staff who help replenish bikes in those cases. Hangzhou is a heavily touristed

Yes, they are used a lot. Sometimes a whole station will be empty, but they have staff who help replenish bikes in those cases. Hangzhou is a heavily touristed city and there are a lot more tourists using the bikes around the scenic spots. But I live far away from tourist spots and there are plenty of bike stations around and plenty of people using them.