Volunteers from Hunan and Jiangxi provinces dig a pit for water storage at the Zhonglin ecological public welfare forest base of Minqin County, northwest China's Gansu Province, April 20, 2026.

A scene of tree-planting is reflected on the goggles of a volunteer at the Zhonglin ecological public welfare forest base of Minqin County, northwest China's Gansu Province, April 21, 2026.

Volunteers insert shovels into the designated area after work at the Zhonglin ecological public welfare forest base of Minqin County, northwest China's Gansu Province, April 21, 2026.

A drone photo shows volunteers planting trees at the Zhonglin ecological public welfare forest base of Minqin County, northwest China's Gansu Province, April 21, 2026.