Silkworms go through four growth stages from hatching to maturity, commonly known as four sleeps, and each sleep (one growth stage) takes one week, so it takes only one month from maturity to cocoon formation, and it takes about two days to complete cocoon formation. The silkworm peeled its cocoon for the last time and became a pupa. After about 10 days, they emerged into silkworm moths and broke their cocoons into moths. After eclosion, the moth will stop eating and mate when its wings become hard.