Where can I find a tennis court in Zhuhai?

There are some gyms, such as Doumen Gymnasium, Zhuhai Gymnasium, and there seems to be a tennis court opposite Carrefour in Zhuhai. The fees are relatively cheap, but those gyms don't seem to charge. Both Jinan University and Phoenix Garden can play tennis, but the price is relatively expensive, generally around 20~30 yuan. It will be cheaper if you add an annual fee.