Beijing Urban Construction Investment Development Co., Ltd. (China Nonferrous Metals Corporation) (0 10)82275538, 0 10-84427227.
China Railway Second Bureau Co., Ltd. (028)667528 1 1
Sinoma International Engineering Co., Ltd. (010) 64399502,64399503
Xinjiang Beixin Road and Bridge Construction Co., Ltd. (099 1)6686277
AVIC Sanxin Co., Ltd. 0755-26063666, 26063692
China Wuyi industrial co., ltd. (0591) 83170122,83170123.
North International Cooperation Co., Ltd. (010) 83916913
China Engineering Corporation (0 10)82688606, 82688653.
Zhejiang Southeast Power Grid Corporation (057 1)82783358