Warm congratulations!!! In Langfang municipal Party Secretary and mayor and other leaders to witness, by the China  Railway Constraction Engineering Co.,Ltd. its Hunan Railway Engineering Shield Technology Co., Ltd. initiated by middle age shield 4S Alliance Base of Beijing Tianjin Hebei flagship project and China Hongtai Industrial Town Development Co., Ltd. in Beijing, Tianjin and Hebei (Langfang) collaborative innovation base successfully signed.