Ching Yun Enterprise Company was established in 1991 and its former name was Yao Zheng Business Association (established in 1978.) Jing Zheng Machinery Co., L.T.D. has been being in this field for almost 30 year and professionally produces every kind of special screw, rivets and custom rivets, custom screw, special bolts and every special shapes of cold forging pieces by using the materials of carbon steel, stainless steel, copper, alloy and so on. We are located in Taichung Country, Taiwan.