Practice: Cook the rice, let it cool, pour in a proper amount of sushi vinegar, stir it evenly, and apply a proper amount of oil on the mold to facilitate demoulding. First, put a layer of rice at the bottom of the mold, compact and flatten it, add stuffing, compact and flatten it, then put another layer of rice, flatten it, cut laver to the height of the mold and surround the rice. Add crab roe and black sesame seeds.