"Excellent Quality, Sincere Conduct, Enthusiastic Service" is the spirit of Xi'an ZhongYun Biotechnology Co.,Ltd. Quality is strictly controlled by corresponding standard in each procedure from selection of materials to product delivery. Professional test equipments like HPLC/GC/UV are used and full-time quality control personnel are deployed. Inspection data like ingredient, moisture and dust content and heavy metal residual and solvents are documented completely and in detail.