1, the fire is not enough: steam seedless barbecue pork buns need to control the fire in the medium to high heat, the fire is not enough heat will lead to less not burst open.

2, the ratio is not right: no species of barbecue pork buns with low-gluten flour, and more water, resulting in not bursting open, re-ratio of 300 grams of low-gluten flour, 50 grams of old flour, 50 grams of water, 150 grams of sugar, 150 grams of low-gluten flour can be.