The secret of grinding sesame paste with stones?

Ingredients: 500g of black sesame, 0/00g of white rice/kloc, 500g of white sugar. Practice: 1. Remove impurities from black sesame seeds, wash and fry until cooked. 2, white rice washed clean, in addition to net moisture, fried. 3. Grind sesame and white rice together, add sugar evenly, put it in a container, and cover tightly for later use. 4. When eating, take it out according to the required amount, add water and cook with low fire, stir while cooking, and boil it into a paste.