Qingdao Jinyuan Jiacheng Trading Co., Ltd.

Qingdao Guangyun Trading Co., Ltd.

Qingdao Ruide Sa'en Trading Co., Ltd.

Qingdao Jinhuihuang Materials Co., Ltd.

Shida Instrument (Huizhou Road Shop)

Jiaozhou Tongda Hardware (Huijin Unit South Area Branch)