The length of time a 36-week preterm baby spends in a warm box is mainly related to the condition of the child at birth and its recovery, which varies from person to person. A baby born at less than 37 weeks normally can be called a preemie. A 36-week-old child is generally not at high risk because its organs are more mature. If the child is born with hypoxia, which is manifested by weak cry, general bruising, poor reaction of bouncing feet, etc., Apgar score below 4-5, or even asphyxia, he/she needs to enter the incubator for treatment at this time. The specific time with the child needs to be based on the child’s recovery, some children recover better, may be about 1 week to get out of the box. Some children have a better recovery and can be out of the incubator in a week or so, while some children may have a longer treatment time due to the severity of hypoxia. Hypoxia is a common clinical phenomenon in premature babies, so parents should not worry too much. Parents should not worry too much. Some of the children can recover quickly if they actively cooperate with the doctor’s treatment.