In fact, if parents educate their children in peacetime and let them know how to ask for help from others or the police when they get lost or encounter accidents, the possibility of being discovered in advance will greatly increase and the possibility of accidents will also decrease. How to ask for help is a compulsory course for children. Parents can't let this compulsory course be absent from their children's lives. At the very least, they should let their children remember the contact information of their parents and relatives. When the author's daughter was 4 years old, she could recite the telephone numbers of the author, his wife and even her hometown fluently and clearly. In this way, even if she doesn't know who to turn to for help, she can at least remember her parents' phone numbers and let others contact her parents. Letting children learn to ask for help is a rainy day and can play a role in the critical moment when children get lost. I hope parents can learn from the loss of a 5-year-old girl, give their children a help-seeking lesson, and let them know the help-seeking skills in an emergency.