In Hangzhou, you can consider the following part-time jobs:

Catering service: You can find part-time jobs in restaurants, coffee shops, bars and other places. These jobs may include entertaining guests, service, cashier, etc.

retail sales: there are many shopping malls, supermarkets and specialty stores in Hangzhou, where you can find the position of part-time salesman. You will be responsible for introducing products to customers, providing consultation and completing sales transactions.