On April 21, volunteers from the Institute of mechanical engineering came to Heiqiao community of Zhenjiang city to join hands with overseas students and children to carry out the wall painting activity of "World Earth Day".

In the early stage of the activity, volunteers came to the civilized propaganda wall of the community in advance to outline the picture outline of environmental protection theme. On the day of the activity, college volunteers and foreign students from Ghana, Pakistan and Morocco came to the community to paint the wall with children and write down the environmental protection slogan. During the activity, we had a wonderful idea to choose the image that we thought could best reflect the environmental protection, and depicted it on the wall through a brush, so as to contribute our intelligence and wisdom to the environmental protection publicity. Through this activity, we expressed our wish to protect the earth's environment and protect our green home to welcome the world earth day. The activities were reported in Xinhua news agency and people's daily.