The specific steps are as follows.
Cut the pork into chunks 10cm square, soak it in cold water for more than 2 hours, and it is best to change the water twice in the middle, so that the blood in the meat will be soaked out;
Wash the soaked pork, put it in the pot, add more water, then cook it together and skim off the foam;
Bring all the seasonings to a boil, then turn to low heat and cook for about 2 hours (you can also use an electric pressure cooker, which will be faster) until the meat becomes particularly soft and rotten.
4.？ Put flour into a pot, and adding dry yeast, baking powder, edible alkali and corn oil;
5.？ Pour clean water and stir with chopsticks into snowflake-like flour wadding;
6.？ Knead into smooth dough by hand (the dough should be harder);
7.？ Cover the dough with plastic wrap and put it in a warm place for fermentation. Don't let it rise completely, just slightly, that is, cut the dough, and you can see that there are small holes instead of big holes.
8.？ Knead the dough evenly and divide it into 8 equal parts (so it's as big as the one bought outside)
9.？ Take one of them, first rub the growth agent until the palm is slightly flat, and then roll it into strips with a rolling pin;
10.？ Roll up the rolled strip-shaped dough sheet from the top and roll it into a tube shape; Then put the cylinder vertically on the chopping board and flatten it into a small round cake by hand;
1 1.？ Roll it with a rolling pin into a round cake with a thickness of 0.8cm and a diameter of about 10cm, and make the rest;
12.？ You don't need to put oil in the frying pan when it is hot. Put the rolled cake in the pot and cover it. Turn over or cover the cake after a small fire, and cover it with a small fire, so that the cake will be branded. The baked cake won't harden if it is left without a lid for an afternoon. If it burns too much, you can put it in plastic wrap and refrigerate it in the refrigerator. When they are taken out, they will soften again after being slightly heated by microwaves.
13.？ Chop the braised pork and add some broth;
Prepare some fried Chili or Chili oil (I didn't have time to take it this time, so I used Laoganma instead), put some warm water and sesame oil into sesame paste and stir it into a thin paste;
Prepare some chopped green onion and coriander;
14.？ Put Baiji buns on the chopping board, hold them in one hand and cut them from the side with the other hand, as long as 1cm is left.
15.？ Spread sesame paste on the cake with a spoon;
16.？ Then spread the minced meat;
17.？ Add chopped green onion, coriander and stir-fried Chili oil (I use Laoganma instead, the black thing on the meat is just that you don't like spicy food).