One must keep the promise made to a child. 
 
Principle 1: Parents should be honest to children.

Parents should think carefully before making promises to children and they should keep the promises rather than break them. If parents could not carry out them, they should give timely explanations, make apologies to children, and have a self-criticism, so that children can understand and forgive their parents from hearts. After that, parents should try their best to keep the promises, because children always take the adults’ words seriously. Otherwise, as time goes by, children will not have confidence in their parents, and think that they can go back on their words. As a result, they will learn to do like that gradually.

Principle 2: Give timely praise and encouragement to children’s honest words and deeds.

Principle 3: Parents should pay attention to and respect the" appointment " among children.

For example, you plan to the grandparents’ with your child on the weekend, while he has agreed to play with other children. In this case, you should respect the appointment made first by children and their littlepartners, rather than force him to break the appointment to obey your arrangement.

Principle 4: If parents found children lying, they should be careful to avoid punish them without any reasons.