Tuning is a preparatory work for Mulberry, including leaf selection, weighing, finishing, and cutting. The mulberry sapling of the small silkworm stage is mainly determined by cutting the mulberry leaves, that is, cutting the mulberry leaves into suitable and neat blades so that the mulberry leaves can be evenly distributed, and the silkworm and the larvae can be evenly grown. The cedar forms are square, rectangular, long, and rough cut. Usually 1 to 2 years of age use square leaves, the size of silkworm body length 2 times square as the standard. The long strip cut width is equal to the length of the silkworm body, and the length of the cut leaf is 5 to 6 times that of the silkworm body. Roughly cut leaves were used for 3rd inbreeding and 4th instar foraging. When giving Sang to "see silkworm to mulberry," grasp the number of sang every day and the amount of mulberry each time, specifically based on the development of silkworm and the wilting speed of mulberry leaves. Usually every 8 to 12 hours to a mulberry, every day and night to Sang 2 to 3 times. At the beginning of each age and during sleep, the amount of mulberry should be less, and the period of food increase, so that the silkworm can fully eat. The small silkworm stage should do a good job of symmetry and expansion before giving mulberry so that silkworms can be evenly distributed on silkworms. In particular, the species tending to light and intensive, often climb to the dense one, but also pay attention to do first uniform, after the mulberry. To Sang generally use a sprinkle, two uniform, three make up, four whole method, so that silkworm everywhere to give the mulberry thickness uniformity, all the silkworms can eat.