JOKER● CHINA● BEIJINGs first company was founded at East Xiao Ma Zhuang Industrial Park, Liyuan Town,Tongzhou District, Beijing in 2004. And Joker has developed to be a modern multi-developing group in the construction materials industry around studing, developing, producing and selling own TTB brand. The factory zone covers 5000 sq.m2 with one glass processing workshop and one metal processin。。。