There are many kinds of national cards, and the most expensive one should be 6000 yuan. I forgot the exact number, per hour 12.
There is also a badminton court at the terminal of the only road leading to Taihe No.2 Road.
The most expensive card in Tongtai is 9998, and the cheapest card is 1998. Call and ask. We often play in Tongtai, because it can swim, so we think it's ok. Morning time is the cheapest, hehe.