First prepare 400g of flour, 50g of milk and corn oil ingredients. Add eggs, yeast and sugar to the prepared flour. Then pour in the milk and flour. Stir while pouring. After stirring into flocculent. Add the corn oil. Knead to form a smooth dough. Cover and let it rise for 20 minutes. Then roll out the dough into a large sheet. Then cut into triangles with a knife. Roll up from the wide end. Brush with egg yolk mixture. Sprinkle a layer of sesame seeds. Then bake in the oven for 20 minutes