C1514 Jade Sea Martial Arts School

"Whirlwind?" What is that thing? " A person next to him said in a foggy tone.

"Like this, your fingers buckle up and down the back of the ball. When you throw it, buckle inwards. Use some force inwards to spin the ball." The handsome young man held a tennis ball in his hand and made a gesture of throwing the ball.

Following which, the tennis ball flew out and landed at Dong Feng's feet