A female giant panda cub weighing 42.8 grams, about the weight of an average chicken egg and the world's lightest ever, was born in Chengdu, capital of southwest China's Sichuan province, on Tuesday, June 11, 2019. (Photos: china.com.cn)

A female giant panda cub weighing 42.8 grams, about the weight of an average chicken egg and the world's lightest ever, was born in Chengdu, capital of southwest China's Sichuan province, on Tuesday, June 11, 2019.

A female giant panda cub weighing 42.8 grams, about the weight of an average chicken egg and the world's lightest ever, was born in Chengdu, capital of southwest China's Sichuan province, on Tuesday, June 11, 2019.

A female giant panda cub weighing 42.8 grams, about the weight of an average chicken egg and the world's lightest ever, was born in Chengdu, capital of southwest China's Sichuan province, on Tuesday, June 11, 2019.

A female giant panda cub weighing 42.8 grams, about the weight of an average chicken egg and the world's lightest ever, was born in Chengdu, capital of southwest China's Sichuan province, on Tuesday, June 11, 2019.