... , Zhangjiagang Huilong Technological Environmental Building Materials Co., Ltd., Zhangjiagang Yihao Flat board Co.,Ltd., Zhangjiagang Qians’ Huilong Import and Export Trade Co., LTd., Huilong Magnesium Oxide Board Factory ... the east of Shanghai and to the west of Suzhou, Wuxi and Changzhou which enjoys a convenient water and road transportation ...