After long of agony in his swimming learning, 4 instructors changed and finally we rip some fruitful result. The boy has some disconnection with water somehow.. we don't know why. He was neither drown or nor struggled with water before but we just cant get him to click with water smoothly and learn his swimming in short time.
This is the 4th instructor-Kelvin (iswim) that he currently be with and we can see that, the progress is improving slowly but definitely better than stagnant. Hope he can swim independently fast soon and I can stop burning my Saturday under hot sun.