Qingdao Ruide Sa'en Trading Co., Ltd.

Qingdao Jinyuan Jiacheng Trading Co., Ltd.

Jiaozhou Tongda Hardware (Huijin Unit South Area Branch)

Shida Instrument (Huizhou Road Shop)

Qingdao Jinhuihuang Materials Co., Ltd.

Qingdao Ruida Standard Element Co., Ltd.