What is the ginger vinegar of Hong Kong people?

This is a tradition in Guangdong, and it is not unique to Hong Kong.

Ginger with pig feet, also known as ginger vinegar with pig feet or ginger vinegar, is a kind of food in Guangdong. The materials are ginger, sweet vinegar, eggs and pig's trotters. Postpartum women rest at home for at least 40 days, commonly known as confinement, to supplement the lost nutrition. They will eat ginger from pig's trotters to nourish and strengthen their bodies. At the moon banquet, ginger with pig's trotters is also an essential dish.

Now I tell others that I have a baby at home. I will send this kind of ginger vinegar to a restaurant (Cantonese style), and sometimes I will sell this kind of ginger vinegar. Because of the sweetness and sweetness of pig's trotters and eggs, Guangdong families sometimes get it.