After the water boils, add rice flour and put as much water as possible; Boil with cold water; Drain water; Add pepper, garlic, onion, ginger and lean meat into another oil pan and stir-fry diced mustard tuber; Add spinach leaves, stir-fry and add light soy sauce to taste; Add rice flour, add soy sauce to color, turn off the fire with chopsticks, fork the dough and shake it quickly and vigorously; Add salt and mix well.