San Hao Wenquan

San Hao Wenquan — 'Number Three Hot Spring' — is a naturally sulphurous geothermal spring in China, the third in a series of numbered hot springs within a single geothermal field or spring complex, its designation indicating that it has been systematically catalogued alongside its named and numbered counterparts as part of a coherent management and presentation of the local geothermal resource. Numbered spring series are common in China's larger hot spring complexes, where multiple outlets of varying temperature, depth, and mineral composition are differentiated by number to help bathers navigate the full therapeutic range of the field. The spring provides warm, naturally sulphurous mineral water as the third expression of its geothermal field's therapeutic character.