The reason for this phenomenon is that the water quality of Nongfu Spring comes from Qiandao Lake, which contains natural mineral elements such as potassium, calcium, sodium, magnesium and metasilicic acid. It is precisely because water contains minerals that mineral precipitation will inevitably occur after heating, resulting in yellow marks.

1. Nongfu Spring, namely Nongfu Spring Co., Ltd., formerly known as "Zhejiang Qiandaohu Yangshengtang Drinking Water Co., Ltd.", was established on1September 26th, 996. Headquartered in Hangzhou, Zhejiang Province, it is the holding company of Yangshengtang. On may 8, 20 19, nongfu spring announced that it had officially entered the coffee industry.

On February 20th 1 September 9th1day, the list of the top 500 manufacturing enterprises in China was released, and Nongfu Spring Co., Ltd. ranked 332nd. On June 7, 2020, 65438 was selected into the list of top enterprises in the national agricultural product processing industry in 20 19, with a comprehensive ranking of 18. On September 8, 2020, Nongfu Spring officially landed on the Hong Kong Stock Exchange, and the opening price increased by more than 85%.