To solve the problem, you need to realize that the racquet face should be tilted down at the low point of the backswing, with the palm of the hitting hand facing down at this point.

• 为了要解决这个问题，你需要了解网拍面应该在背向拉拍的低点倾斜往下，打击的手掌在这一点朝向下面。