Shenzhen Company:
Shenzhen Si-stacking Technology Co., LTD
Add: No.1307, Tower A, Huangjia Business Center, Longhua Avenue, Longhua District, Shenzhen
Tel :0755-2100 6160
Fax :0755-8322 7195

Hongkong Company：
HONGKONG VIRTUE INTERNATIONAL GROUP CO.,LIMITED
ADD：Unit D01, 3/F,, Wong King Industrial Building, No.2 Tai Yau Street, Kowloon, HK
Tel :00852-6720 0543 
Fax :00852-3585 7491