Chang Cheng Environmental Protection is a world-class think tank., high-end production and research center, smart environmental protection big data and other environmental think tanks.Rely on integrated global eco-environmental service providers, experts, polluting enterprises, local governments and other massive information resources online platforms, and supplemented by global eco-environment offline technology promotion and local operation and maintenance centers. And positively supply the development support of high-tech ecological protection and environmental management enterprise for the sustainable cause of human civilization. Arrange experts to visit Hebei Fenglongshan Casting Co., Ltd. for investigation and guidance for rectification.