Zhengcaotang was established in 2003 and mainly provides wholesale of Chinese herbal medicine pieces, Chinese medicine granules, soup bags, tea bags and OEM products. Our traditional Chinese medicines are produced by GMP pharmaceutical manufacturers and HAVE STRICT control OVER QUALITY, including sulfur dioxide, pesticide residues, heavy metals and other harmful substances. WE SUPPLY to major hospitals, university Chinese medicine clinics and Chinese medicine chain pharmacies in Hong Kong, with absolute quality assurance.