π (pai) in four tones, is the symbol for pi in math (not Cha Wu Wu Wu!).

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Nongfusanquan that is Nongfusanquan Limited formerly known as the "Zhejiang Qiandao Lake Yangshengtang drinking water Co.

Nongfushanquan, formerly known as "Zhejiang Qiandao Lake Drinking Water Co.", is a holding company of Yangshengtang, founded on September 26, 1996, and is headquartered in Hangzhou, Zhejiang Province.

The company is a drinking water manufacturer in mainland China, with eight high-quality water bases in Zhejiang Qiandao Lake, Jilin Changbai Mountain, Hubei Danjiangkou, Guangdong Wanlv Lake, Shaanxi Taibai Mountain, Xinjiang Tianshan Manas, Sichuan Emei Mountain, and Guizhou Wuling Mountain.

April 22, 2000, the company announced that all natural water production, stop producing pure water? In the same year, the company was awarded the honorary title of "partner of the Chinese Olympic Committee" and "enthusiastic sponsor of the Beijing 2008 Olympic Games Bid Committee".

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