Home to numerous centuries-old tea gardens, Xishuangbanna in Southwest China's Yunnan Province is one of the country's best-known regions for Pu'er tea. On the province's Nannuo Mountain, there is one 800-year-old tea tree that produces only about 1 to 1.5 kilograms of tea leaves each year. So precious is its harvest that the local village that is home to the tree auctions off the right to pick its leaves during an annual tea-tree harvesting ceremony. According to local villagers, in recent years, the auction price has reached around 500,000 yuan ($70,000).