Farmers pick tea leaves at a base in Zhangjiajie, central China's Hunan Province, Sept. 5, 2018. (Photos: Xinhua)

A farmer picks tea leaves at a base in Zhangjiajie, central China's Hunan Province, Sept. 5, 2018.

Tea fields here have entered autumn harvest season recently.

Farmers pick tea leaves at a base in Zhangjiajie, central China's Hunan Province, Sept. 5, 2018.

Tea fields here have entered autumn harvest season recently.