During my high school year, I had used my summer time to train
- 6 days weekly, and
- 6 hours daily.
After 3 months of such training, I could feel a big diference. In college, I also jointed in a longfist class with different teacher (GM Han Ching-Tan's son) but from the same teacher's teacher. That teacher's comment to me was, "You are a class A student. All my students here are only class B students". Apparently the summer time serious training does make big difference.