What grade do the hot springs in Gu 'an belong to?

Four-star standard. Gu 'an, known as the hometown of hot springs, is rich in geothermal and mineral water. It is one of the largest geothermal fields in northern China and the core of the camel uplift in North China. The hot spring water, metasilicic acid medical hot mineral water, can enter the human body through the skin and wash and clean the skin and skin mucosa through immersion bath, which has the characteristics of large storage, shallow burial, high temperature and good water quality.