Put vinegar in pasta, which is often used when fermenting dough. You can use vinegar and sugar to make flour fertilizer, and then use it to make enough flour fertilizer. Mix dough according to a certain proportion to promote dough fermentation and make various fermented pasta. After the dough is fermented, it is necessary to use surface alkali, which mainly uses the principle of "acid-base neutralization" to remove the sour taste in the dough and make delicious pasta.