A girl has fun at a park on World Children's Day in Islamabad, capital of Pakistan, Nov. 20, 2020. World Children's Day is celebrated on Nov. 20 each year to promote international togetherness, awareness among children worldwide, and improving children's welfare. (Photos: Xinhua)

Children wearing face masks have fun at a park on World Children's Day in Islamabad, capital of Pakistan, Nov. 20, 2020. World Children's Day is celebrated on Nov. 20 each year to promote international togetherness, awareness among children worldwide, and improving children's welfare.

Children enjoy swing ride at a park on World Children's Day in Islamabad, capital of Pakistan, Nov. 20, 2020. World Children's Day is celebrated on Nov. 20 each year to promote international togetherness, awareness among children worldwide, and improving children's welfare.