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What ethical principles did the collapse of Lianhua River Garden Building in Shanghai violate?

According to the regulations on umbrella management, developers fail to perform, incorrectly perform or passively perform their respective duties, and are irresponsible for the personal safety of the owners and have no sense of responsibility. Lotus Riverside Garden 20 10 was built by Shanghai Dumei Real Estate Development Co., Ltd., and the residential property company was Shanghai Vanke Property Management Co., Ltd.