Address Gusali 7-16, No.188, South 4th Ring West Road, Beijing, China Mail yangshan@const-mach.com chenyoufeng@const-mach.com liuyapeng@const-mach.com Telepono G. Yang ： 15010377396. G. Chen ： 13801306377. G. Liu ： 15233730575. Mga oras ng pagpapatakbo Lunes-Biyernes: 9am hanggang 6pm Sabado, Linggo: Sarado
