... Zhongtian Industry Co., Ltd (Former Name: Jinan Dinghan Building Materials Co., Ltd, and Jinan Donghan Building Materials Co., Ltd), it mainly ... Silver Vein, Copper Vein, Oil Rubbed Copper, which received high reputation from the customersZhongtian Industry Co., Ltd covers an area ... “credit and win-win policy”, Zhongtian Industry Co., Ltd has established friendly and steady cooperation relation with ...