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- Shanghai Golden Zen Import&Export Trading Co., Ltd
- Tel:021-50431161 021-50431162
- Direct Line:021-50493978（Foreign） 021-50493977
- Fax:021-50493979
- Guangzhou Longstone Import & Export Trading Co.,Ltd
- Tel:020-87632100
- Direct Line:020-87791712（Foreign) 020-32217462（Domestic)
- Fax:020-87632093
- Henan Xinlida Chemical Co., Ltd.
- Tel:0371-68763211
- Direct Line:0371-86037701
- Fax:0371-68786585