I love Spa. Especially those mountain hot springs are attractive for me.
Below some famous spa resorts will be listed for your reference.
Nanjing
     —Tangshan Spa tour

Tangshan Town locates in Nanjing which is a famous historical city. After tour the wonderful scenic spots in the urban of Nanjing, you will have a good experience of hot spring in Easpring Resort. Easpring Resort locates in Tangshan Town. Easpring Hot Spring is the best hot spring in Nanjing; in here you will have a 5-star enjoyment. 
Nanghai

Hot Spring in Ninghai is one of the three famous hot springs in China. It is surrounded by the well-known Tiantai Mountain and Siming Mountain. The verdant forests will create a huge natural oxygen bar. To roam within, you can find yourself part of Nature. The hot spring also has remarkable curative effects for diseases, such as all kinds of skin diseases, arthritis and cardiovascular diseases as well as diseases regarding the nerves and digestion. Bathing in the spring can make you feel smooth and comfortable all over, and can totally make you revive.

Beijing
     — Chunhuiyuan Hot Spring tour

There are two famous hot spring resorts outside the city of Beijing proper. One is Jiuhua Spa & Resort; the other is Chunyuiyuan Hot Spring Resort. Actually the two spa resorts have the same springhead – Xiaotangshan hot spring. Xiaotangshan has been famous for its hot springs for over 300 years. Local legend has it that the imperial family of the Qing Dynasty (1644-1911) went there to relax. The temperature of water here ranges from 29 C to 90 C. People have used hot spring water in therapeutic baths for more than 200 years to treat rheumatism and other ailments. For foreign tourists, this is perhaps one of the most memorable cultural experiences and it will certainly spoil you.