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First, the feed transition. After the end of the growth period, the feed during the growth period should be replaced with feed during the laying period in time to prepare the eggs for nutrition. Second, the transition of feeding. That is, the gradual transition from growth term feeding to free feeding. During the growth of laying birds, there is a longer period of limited feeding period. After entering the laying period, the weight of laying birds has a compensatory increase process, coupled with the continuous increase of egg production, the demand for feed The amount is also getting larger and larger, so before reaching the peak of production, we must not limit the amount of feed or the amount of fixed feed. We should increase the amount of feed as we increase the amount of feed, until the amount of feed with the feed When the increase in egg production no longer increases, the feed amount at this time is used as the stable feed amount after the egg bird. Third, the transition of light. From the light of the growing period, it gradually transitions to a stable light of 16 hours/day. The light intensity is 2 to 3 watts per square meter, and the light intensity distribution is required to be uniform. The length of the increase of the weekly light time is not more than 1 hour.