Qiandao Lake Yunwu Tea is produced in Qiandao Lake, Chun 'an County, Hangzhou City, Zhejiang Province, and is a kind of high-quality tea. Wuyun tea in Qiandao Lake before Qingming is light in taste, but rich in aroma. Tomb-Sweeping Day drinks it for 7-20 days, and the tea leaves are larger, but the fragrance and taste reach the best state. This is because the growth and fermentation process of tea will affect the formation of taste and aroma.