The average novice should start with 18 kg. You can control the trajectory of the ball when hitting the ball, press it for two hours every day for at least three months, and then slowly add pounds. Raise two Jin at a time, and keep it at 24 or 26 Jin.

Note that the racket string is broken. You should immediately cut the rest from the middle to both sides with scissors, first cut the horizontal line, then cut the vertical line, leaving the racket frame to stay.