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.
Analyze the relationship between 'Tongrentang' and 'Beijing' within the context of the input sentence.
Options: parent organization, developer, headquarters location, stock exchange