In fact, the key to most gravy is temperature. Collagen in pig's trotters is easy to solidify at high temperature, and the meat quality is more difficult to rot after solidification. Pig's trotter soup is thick, sticky and white because it is slowly boiled under a small fire.

It is formed by a large amount of collagen dissolved in soup. You can't use fire to cook pig's trotters soup. You can only make the water bubble slightly, and the water temperature should be controlled at about 90 degrees. When boiling water in a pot, it can be observed that a large number of small bubbles will gather at the bottom of the pot when the water is about to boil.

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Pig's trotters are rich in collagen, and the fat content is lower than that of fat. They can prevent skin from drying and wrinkling, and enhance skin elasticity and toughness. It is a healthy food suitable for all ages, especially a beauty and anti-aging food.

According to legend, from the Tang Dynasty, Jinshi met his palace exam. If one of them becomes a leader in the future, we should ask calligraphers with the same theme to name the Big Wild Goose Pagoda with Zhu Shu (red pen). In the future, whenever someone takes an exam, relatives and friends will give him pig's trotters-"pig" and Zhu Tongyin, and "hoof" is homophonic. The purpose of giving pig's trotters is to hope that candidates who want to be top scholars will become leaders.

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