What are the solar terms of silkworm chrysalis?

It takes about five to six days for spring silkworms to lay silks and cocoons on the cluster, three to four days in summer and autumn, and two days after pupation is the best. At this time, you can cut the cocoon layer and take out the silkworm chrysalis. Silkworms reproduce by eggs. After the fertilized egg is laid, with the cooperation of external environmental conditions, it gradually evolves into an embryo, develops into a larva and hatches after extremely complicated changes. Silkworm eggs can be divided into over-age eggs and non-over-age eggs. Eggs for New Year's Eve have a long period of time. After laying eggs in spring or autumn, the embryo will stagnate for about a week. Under natural conditions, they must survive the cold winter and continue to develop and hatch until it is warm next spring. The egg period of young eggs is short. After the egg is laid, the embryo develops continuously, and it only takes more than ten days to hatch.