Nanjing Tong Rui Bio-Tech Co., Ltd. (TRB), is the China Leading manufacturer and exporter of herbal extracts and its derivatives for more than 20 years. TRB is a technology-based company that combines research and development, production and international market sales. TRB products include the Herbal extracst, Sweeteners, Nootropics, Vegetable https://www.trbextract.com/