add: 北京市朝阳区望京西路48号院金隅国际c座3103

        room 3103, no.5 bldg, city one,

        no.48 wangjing west road, chaoyang dist.,beijing,china

zip:100102

tel: 010-84278611/84280466

e-mail: sales@dingrun.com

web: www.dingrun.com