1952年在党的领导下,北京市大兴和河北省永清、固安、安次四个县的广大贫下中农,自力更生,奋战两年,营造了主副带总长达6,425华里的防护林网。二十多年来发挥了防风固沙,保护农田,扩大耕地的巨大作用。粮棉油大幅度增产,同时生产了15,000立方米木材和条、杆、杈等林副产品,有力地支援了国家建设和促进了社、队集体经济的发展。 In 1952, under the leadership of the party, the majority of poor and middle peasants in Daxing, Beijing, Yongqing, Gu’an, and Anji County of Hebei Province worked hard for two years to create a shelter forest network with a total length of 6,425 liras. In the past 20 years, it has played a significant role in windbreak and sand fixation, farmland protection and farmland expansion. The production of grain and cotton oil has been greatly increased. At the same time, 15,000 cubic meters of lumber and the forest by-products such as bars, poles and twigs have been produced, effectively supporting the state’s construction and promoting the development of social and team collective economy.