Babies participate in a baby crawling contest at a shopping center in Daxing District, Beijing, capital of China, Sept. 13, 2020. (Xinhua/Li Xin)

Parents and their babies participate in a baby crawling contest at a shopping center in Daxing District, Beijing, capital of China, Sept. 13, 2020. (Xinhua/Li Xin)

Babies participate in a baby crawling contest at a shopping center in Daxing District, Beijing, capital of China, Sept. 13, 2020. (Xinhua/Li Xin)

A baby participates in a baby crawling contest at a shopping center in Daxing District, Beijing, capital of China, Sept. 13, 2020. (Xinhua/Li Xin)

Parents and their babies participate in a baby crawling contest at a shopping center in Daxing District, Beijing, capital of China, Sept. 13, 2020. (Xinhua/Li Xin)

Babies participate in a baby crawling contest at a shopping center in Daxing District, Beijing, capital of China, Sept. 13, 2020. (Xinhua/Li Xin)