The indications of successful reduction of intussusception by air enema treatment are as follows: First, after the removal of the tube, a large amount of foul-smelling mucousy bloody stool and yellow feces are expelled. Second, the patient quickly falls asleep, no longer cries, and ceases to vomit. Third, the abdomen is soft and flat, with no palpable mass as before. Fourth, after the enema reduction, 0.5-1 grams of activated charcoal is administered orally; if charcoal residue is expelled within six to eight hours, it indicates a successful reduction. However, even after successful reduction, it is necessary to remain under observation in the hospital for two to three days to monitor for any recurrence of the intussusception.