Use a mixer to make the filling; refrigerate it

Use a mixer to make the dough; divide the dough into 12 pieces (each one is about 40 grams)

Use a mixer to make the roux (optional); divide the roux into 12 pieces

Wrap each small piece of roux into a small piece of dough; make them into balls

Make the buns -- flatten the balls and wrap the filling into them

Preheat the oven to 400F; at the same time use some water to stick white sesame seeds on each bun, and then bake the buns for about 20-25 minutes