The ingredients that need to be prepared in advance include: 500g of medium gluten flour, 120g of boiling water, 100g of cold water. the specific method is as follows:

1, first of all, prepare the ingredients needed for the dough (half hot noodles). 300g of gluten flour, 120g of boiling water, 100g of cold water, 20g of duck fat.

2. Pour the boiling water into the flour in a circular motion so that it doesn't concentrate at a fixed point, and use chopsticks or a spatula to stir back and forth in a circle to loosen the boiling water and flour.

3. Instead of waiting for the dough to cool, pour in 100g of cold water.

4. Stir the dough into a ball, cover with plastic wrap, and let it rest at room temperature for 50 minutes.