Legend told on the ancient Silk Road, tea caravan encountered rain, the tea moistened by rain mildew and became worthless. Tea merchants can't help but abandon it and went away. Next year, an outbreak of dysentery made many people died in the village. When people got nothing to eat, tea merchants gave the mildewed tea to the poor families. Miracle occurred. Sick people recovered from the illness.
According to historical records,dark tea emerged much earlier than the legend told. According to "History of the Ming Food and Money," it said: "Shenzong Wanli thirteen years (AD 1585) ... ... Tea is exchanged for horse, As Hunan tea is cheap,cross-border private and selling of Hunnan hei cha prospered"
Sichuan Dark Tea,Sichuan Hei Cha also named Sichuan Route Tea (四川边茶) including Southern route tea（南路边茶）and Western route tea（西路边茶);
Sichuan Pu'er Tea: mainly produced in Yibing and its neighboring areas of Sichuan province;
Hubei Dark Tea, Hubei Hei Cha;
Laoqing Tea: mainly produced in Chibi, Xianling, Tongshan, Chongyang of Hubei province;
Hunan Dark Tea, Hunan Hei Cha;
Raw Dark Green Tea（黑毛茶）;
Dian-Gui Dark Tea（Dian-Gui Hei Cha 滇桂黑茶）;
Yunnan Pu'er Tea;
Liupu Tea（六堡茶）,originally produced in Liupu village, Changwu of Guangxi province, Now its producing areas includes more than 20 counties of Guangxi province;
Bainiu Tea（白牛茶）, produced in Jinxiu, Guangxi province;
Liudong Tea（六垌茶）, produced in Xing'an, Guangxi province;
Xiuren Tea（修仁茶）, produced in Lipu, Guangxi province;
Wantian Tea（宛田茶）, produced in Lingui, Guangxi province;