This year’s Earth Day has the theme “Invest In Our Planet.” Every year on April 22, Earth Day marks the anniversary of the birth in 1970 of the modern environmental movement. Schoolchildren across China celebrate Earth day in their own special ways. Primary school students show their paintings in Bozhou, East China's Anhui Province, on Thursday. (Photo: Zhang Yanlin/People’s Daily)

Children from the mountainous areas of northern Guangxi Zhuang Autonomous Region learn about the birth of the Earth, astronomical development, astronauts and environmental protection in Rong'an county, on Thursday. (Photo: Wei Rongjun/People’s Daily)

Primary school students display Earth paintings in Zhenjiang, East China's Jiangsu Province, on Thursday. (Photo: Shi Yucheng/People’s Daily)

Primary school students color a scroll promoting environmental awareness in Qinhuangdao North China's Hebei Province, on Thursday. (Photo: Cao Jianxiong/People’s Daily)

Students learn about saving resources and caring for the environment in Changji, Northwest China's Xinjiang Uygur Autonomous Region, on Friday. (Photo: Yang Bin/People’s Daily)

Kindergarteners paint scrolls in Taizhou, East China's Zhejiang Province, on Thursday. (Photo: Wang Huabin/People’s Daily)

Students at No. 26 Middle School sign an Earth Day message in Hohhot, capital of North China's Inner Mongolia Autonomous Region, on Thursday. (Compiled by Yin Yue, edited by Dong Feng)