Platycodon grandiflorum is a perennial herb, which is often pickled into kimchi in the northeast of China, while it is often used to make kimchi in the Korean peninsula.
Campanulaceae is the only species of Campanulaceae, which grows in China, Korean Peninsula, Japan and East Siberia. Young leaves can be pickled into pickles, and the northeast people call them "Goubao" pickles. In the Korean Peninsula and Yanbian area of China, Platycodon grandiflorum is a very famous kimchi ingredient, which is described in the local folk song "Ballad of Orange Stem".