- Xi'an Rongde Import & Export Trade Co., Ltd
- 5-HTP, Extract, Flavone, Sennoside, Salicin.
- Address:No. 35 Tangyan Road Xian Shanxii 710065 China
- Tianjin Zhongxin Pharmaceutical Group Corporation Ltd.
- magnolol, resveratrol, sennoside, polydatin, Emodin , ....
- Address:№ 21, 10th Avenue, TEDA, Tianjin 300457, P.R.China Tianjin Tianjin 300457 China
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