Photo taken on Aug. 17, 2019 shows books of "The Complete Collection of Bronzes Unearthed in China" in Beijing, capital of China. "The Complete Collection of Bronzes Unearthed in China" published by Science Press made its debut in Beijing Saturday. (Xinhua/Luo Xin)

Photo taken on Aug. 17, 2019 shows books of "The Complete Collection of Bronzes Unearthed in China" in Beijing, capital of China. "The Complete Collection of Bronzes Unearthed in China" published by Science Press made its debut in Beijing Saturday. (Xinhua/Luo Xin)

A staff member shows a book of "The Complete Collection of Bronzes Unearthed in China" during a book launch in Beijing, capital of China, Aug. 17, 2019. "The Complete Collection of Bronzes Unearthed in China" published by Science Press made its debut in Beijing Saturday. (Xinhua/Luo Xin)