Generally, it needs to be pressed over medium and low heat for about 20 minutes. If you want to taste soft and rotten, you can extend it for a little longer. Boil the pig feet with a pressure cooker. Generally, the fire is boiled. After boiling for 2-3 minutes, the fire is adjusted to medium and small fires. It is not suitable to use the fire for a long time, otherwise it will be easy to dry. The pig's feet need to be pressed for several minutes. It usually takes about 25-30 minutes to stew the pig's feet with a pressure cooker. The pressure time after air application should not be too long, otherwise the taste of the stewed pig's feet will be poor.
Pig feet should be boiled with cooking wine and ginger slices for about 2-3 minutes before being stewed in a pressure cooker.
You can add an appropriate amount of hawthorn or white vinegar to the pig's feet, which can not only speed up the stew, but also improve the taste of the pig's feet. （ZhuJiaoShangQiYaoYaJiFenZhong）