Eligibility 1. To receive the discount, please request the discount code from our CRO team when you place your customized service order. 2. Simply reference the discount code when you place your catalog product order. 3. The discount code will be valid through March 31st 2021. 4. Cannot be combined with any other discount and/or promo code. 5. Only US-based direct customers are eligible. 6. Sino Biological reserves the right to change or terminate the promotion at any time.