It's time to make a determination, but from the perspective of natural process, it's best to make a determination when boys are 15 to 20 years old, that is, when they are adolescent. At this time, everything can be absorbed, and it is easy to establish values that determine the future. Determination is navigation, just like GPS. If you have GPS navigation, you won't get lost. Resolve this problem. If you don't stand well and lack a GPS in the back, how can you have a direc...