For pitchers, there are two kinds of change balls (curveball) that are easy to learn: slider and curveball (red line). For right-handed, this change will make the ball deviate further from the right-handed body, while for left-handed, it is easier to hit the batter. However, if a right-handed person wants to learn to spin the ball (green line) on the right-handed side, it will take a lot of effort, and there is also the danger of spraining his arm. But once practiced, it is often very powerful. The former "Taiwan Light" king of the new york Yankees used this ball to beat the Quartet. There is also a right-hander named Nishimoto Shinji in Japan, who is good at throwing this kind of "floating ball" (the ball that floats to the inside of the right batter's body). Hong Wen once mentioned in his book The Winning Equation: "Every time I think about playing against West Ben Paul, I feel that the ball will turn to my head. How to hit the ball in this state? Before I went on stage, I thought,' Today is over.'