2. Add proper amount of butter when mixing flour.

3. Brush the egg white on the dough surface before it enters the oven.

4. Cut the pork belly with scissors along the upper and lower holes and spread it flat. Add washed grains, pour in proper amount of flour, oil and vinegar, and knead repeatedly.

Rub for about 5 minutes, rinse with clear water, repeat, scrape once inside and outside with a knife to remove dirt, and rinse with water.

Washington State

5. Boil a pot of water, add 3 slices of ginger and half a bowl of rice wine, add pork belly after boiling, cook for 3 to 5 minutes until the pork belly hardens, and take out.

After cooling, cut into strips about 2 cm thick for later use;

6. Wash Poria cocos (Poria cocos), Chinese yam, lotus seeds, coix seed and Euryale euryales, and add pork tripe, ginger and half a bowl of rice.

Boil the wine with strong fire for 20 minutes, and then simmer for 2 hours. Season with salt and serve.