As a parent, you can take the following measures to help your children improve their interpersonal skills:

Imitation: Let children learn how to deal with interpersonal relationships from your behavior.

Education: teach children how to express their ideas, how to listen to others' opinions and how to solve contradictions.

Exercise: Let children practice their interpersonal skills in real situations.

Appreciation: Actively appreciate children's efforts and encourage them to continue their efforts.

Feedback: Give children constructive feedback to help them improve their interpersonal skills.

I hope these measures can help your children improve their interpersonal skills.