
Grand Advance Corp.China

Shandong Chaofu Diamond Jewelry Co.,Ltd.Shandong Sheng, China

Ruian Jiayuan Machinery Co., Ltd.Zhejiang Sheng, China

Luoyang Vida Petrochemical Engineering Co., Ltd.Henan Sheng, China

Hunan Tianyu Equipment Installation Co., Ltd.Hunan Sheng, China

Yunnan Xiaorun Technology Service Co., Ltd.Yunnan Sheng, China

Qingdao Tianrui Technology Group Co., Ltd.

Dongguan Vik Industrial Co., Ltd.Guangdong Sheng, China

SGS-CSTC Standards Technical Services (Shanghai) Co., Ltd.Shanghai Shi, China

Takacho Kensetsu KK

Yamagiwa Co., Ltd.Hyogo-ken, Japan

Jiangxi Xiangku Industrial Co., Ltd.Jiangxi Sheng, China