Tongli stem is produced in Tongbai County, Nanyang City, Henan Province. Tongbai County has more than 1,000 kinds of natural Chinese herbal medicines, which is known as the "treasure of Chinese medicine". Tongtong platycodon was named as Tongling Terrier by the "Compendium of Materia Medica" due to its production in Tongbai Mountain, Tongbai County. Tong platycodon has a unique chrysanthemum heart, which can be used to remove sputum, remove evil phlegm, remove internal leakage and throat. Originally wild, it can now be planted by hand. In April 2006, the General Administration of Quality Supervision, Inspection and Quarantine approved the implementation of GI products for the protection of platycodon grandiflorum.