Dong Ding, spelled as "Tung Ting", is an Oolong tea from Taiwan originally grown in Dong Ding Mountain. Nowadays, the tea is also produced in other locations in Taiwan and even in other countries like Thailand. The original cultivar, Qing Xin, was taken from a much older tea plant in China's Wuyi Mountains in Fujian Province. The name "Dong Ding" means "Frozen Summit", which is the name of the mountain in Taiwan on which the original tea plants taken from the Wuyi Mountains were planted.
The original Dong Ding is from Luku region in Nantou province in Taiwan. However, this area has long been used for tea cultivation. Production is now scarce and quality varies. Many Dong Ding nowadays are produced from other Nantou high mountain tea and follow the traditional Dong Ding production method. Dong Ding is typically medium roasted (about 30%).
Dong Ding is still primarily hand-picked and is either charcoal or machine roasted. For many oolong lovers, Dong Ding is considered the premium Taiwanese Oolong tea.