1. Establish good values: Parents should first educate their children about correct values and let them know what true friendship is and what false friendship is. They should teach their children that true friends are those who will be by your side when you need them, not those who will only accompany you when you are happy or successful.

2. Cultivate children's social skills: Parents should teach their children how to interact with others and how to deal with interpersonal relationships. This includes how to express your thoughts and feelings, how to deal with conflicts and differences, and how to respect others.

3. Supervise children's social activities: Parents should pay attention to children's social activities and know their friends and their activities. If children's friends are found to have problems, parents should intervene in time to help them solve the problems.

4. Teach children to distinguish false friendship: Parents should teach their children how to distinguish false friendship. For example, if a person treats you well only when you are successful or happy, but leaves you when you encounter difficulties or failures, then this person may not be a true friend.

5. Encourage children to make diversified friends: Parents should encourage children to make friends with different backgrounds, interests and personalities. This can help children broaden their horizons and enhance their social skills.

6. Lead by example: Parents' own behaviors have a great influence on their children. Parents should set an example, show honesty, kindness and respect for others, and let their children learn the correct way to make friends.