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4月21日,在第42个“世界地球日”来临之际,由“节约资源、保护环境,做保护地球小主人”活动全国组委会办公室、中国观赏石协会秘书处、北京市海淀区少工委主办的“观赏石知识进校园”征文活动北京地区颁奖仪式暨专家讲坛在北大附小举行。
On April 21, at the 42nd World Day of Earth, the National Organizing Committee Office, the Secretariat of China Ornamental Rock Society, the “Organizing Committee for Resource Conservation, Protecting the Environment and Protecting the Earth” Beijing Haidian District Working Committee sponsored “Ornamental stone knowledge into the campus ” essay activities in Beijing ceremony and expert forum held in Peking University attached small.