Worker weigh freshly-picked tea leaves at a tea plantation in Yingde City, south China's Guangdong Province, Nov. 3, 2020. Yingde City, located at the northern mountainous area of Guangdong Province, is famous for its black tea plantation. (Xinhua/Deng Hua)

A worker picks tea leaves at a tea plantation in Yingde City, south China's Guangdong Province, Nov. 3, 2020. Yingde City, located at the northern mountainous area of Guangdong Province, is famous for its black tea plantation. (Xinhua/Deng Hua)

Aerial photo taken on Nov. 3, 2020 shows workers picking tea leaves at a tea plantation in Yingde City, south China's Guangdong Province. Yingde City, located at the northern mountainous area of Guangdong Province, is famous for its black tea plantation. (Xinhua/Deng Hua)

A worker selects freshly-picked tea leaves at a tea plantation in Yingde City, south China's Guangdong Province, Nov. 3, 2020. Yingde City, located at the northern mountainous area of Guangdong Province, is famous for its black tea plantation. (Xinhua/Deng Hua)