在社会主义市场经济条件下，如何适应新形势的变化，振兴国有企业？北京城建四建设工程有限责任公司在深化改革，转换机制，建立现代企业制度的过程中，主动出击，勇于探索，大胆实践，依靠改革求发展，走出了一条自我发展的新路子。启示一：早“断奶”、早长大北京城建四公司? Under the socialist market economy, how can we adapt to changes in the new situation and revitalize state-owned enterprises? In the process of deepening reform, transforming mechanisms, and establishing a modern enterprise system, Beijing Urban Construction Fourth Construction Engineering Co., Ltd. took the initiative, dared to explore, boldly practiced, and relied on reforms to seek development, and emerged a new path of self-development. Revelation 1: Early “weaning” and early growth of Beijing City Construction Company IV?