This famous, now international, herbal medicine shop has been peddling pills and potions since 1669. It was a royal dispensary in the Qing dynasty and its medicines are based on secret prescriptions used by China's imperial household. You can be cured of anything from fright to encephalitis, or so the shop claims. Traditional doctors are available on the spot for consultations.
Look for the pair of qílín (hybrid animals that appear on Earth in times of harmony) standing guard outside.