2. Pig's foot ginger, also known as ginger vinegar, is one of the first choice foods for postpartum tonic of Guangdong women. Cooked ginger is not spicy, pig's feet are not greasy, and black vinegar is sweet but not sour, so not only mothers love it, but also men, women and children. Especially when it is cold in winter and cold in spring, it can invigorate qi and activate collaterals, wake up the stomach and taste delicious.