Aerial photo shows people planting trees in Nanping City, southeast China's Fujian Province, March 12, 2021. Friday marks China's National Tree Planting Day.

Students plant saplings in Danzhai County, southwest China's Guizhou Province, March 12, 2021. Friday marks China's National Tree Planting Day.

Volunteers plant saplings in Qingzhou City, east China's Shandong Province, March 12, 2021. Friday marks China's National Tree Planting Day.

Children plant saplings at their kindergarten in Jianye District of Nanjing, east China's Jiangsu Province, March 12, 2021. Friday marks China's National Tree Planting Day.

Volunteers plant trees in Peng'an County of Nanchong City, southwest China's Sichuan Province, March 12, 2021. Friday marks China's National Tree Planting Day.

Aerial photo shows volunteers planting saplings in Handan, north China's Hebei Province, March 12, 2021. Friday marks China's National Tree Planting Day.

Children plant saplings at their kindergarten in Jianye District of Nanjing, east China's Jiangsu Province, March 12, 2021. Friday marks China's National Tree Planting Day.

Students plant saplings in Zunhua, north China's Hebei Province, March 12, 2021. Friday marks China's National Tree Planting Day.

Children plant a sapling at their kindergarten in Ji'an, east China's Jiangxi Province, March 12, 2021. Friday marks China's National Tree Planting Day.

A kid waters a tree sapling in Sanming, southeast China's Fujian Province, March 12, 2021. Friday marks China's National Tree Planting Day. (Photos: Xinhua)