- Choi Wan Company Limited
- Address:Sheung Hei St.
- Alpha International Hongkong Limited
- Address:23 Austin Road
- KA FU COMPANY
- Address:RM. 1010, Block A, Merit Industrial Centre
- Aplus gem co
- Address:62 Hoi Yeun Road, Camel Paint Building, Blk 2, 9 / F, Flat D18
- Quartz Sources - LANS Ltd
- Address:3 / F Jonsim Place 228 Queen Road East
- A.K.N. Company Limited
- Address:Room-D,11/F,8 Hart Avenue, Tsim Sha Tsui,Kowloon
- Grand Fortune Trading Co
- Address:Rm 607, Yen Sheng Centre, Hoi Yuen Road, Kwun Tong
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