... . ENVIRONMENTAL FRIENDLY 1) About us:Dingzhong Group (Chongqing Dingzhong Construction Engineering Co., Ltd, Chonqing Zhongcheng Prefab House Co.,Ltd) ... specializing in design, produce, and assemble of prefab house, container house, modular hosue and sentry box of mid-grade ... 5-10 times without construction waste.Widely function: Prefab house could be used in temporary office, dormitory, warehouse ...