"Hah! Ha!," little kids of around 6 years of age were training in the field. There were kids as young as 4 years old as well. They were punching the empty air in front of them. With each kick, they threw sand up in the air.
Every morning after the sun came up, they had to train like this for the next 2 hours.
"Hah! Hah!" they continued training.
A middle-aged man with thick black hair walked along the front of the training children with a stick in his hand. He saw a 5-year-old looking girl punch out weirdly. He lightly hit her arm and leg and got her to the correct posture.
The girl didn't cry out from being hit. She didn't even feel pain. Instead, she smiled wide and thanked him. The old man smiled and walked along.
He did the same thing to the various other children as well, none of whom hated him for hitting them. To them, they just didn't feel the pain anymore.