I think that the gap is usually in the age of fourteen or fifteen. Because then we are in adolescence, we begin to have their own way of thinking and ideas, So will the parents will be inconsistent and contradictory to the idea. We compared the differences in their growth and the course is too high. We can not understand their psychological development as they have no experience like us, we always feel inadequate understanding of their parents. Meanwhile, their parents are sure that we understand very well. In fact, we are a lack of communication, if we sit down and good parents, talked to each other's mutual patience with the idea of each other, then we will eliminate the gap.