Leaders of the market for these remedies, like Beijing Tongrentang Co Ltd, have products with snakeskin, dried toad, centipede, scorpion and dandelion to treat swelling, and others with oyster, ginseng and black-bone chicken for menstrual pains.
Utilize the input text as a context reference, choose the right relationship between 'Tongrentang' and 'Beijing' from the options.
Options: developer, parent organization, headquarters location, stock exchange