The drawing obtained from Pi Xiaojiang’s official WeChat account https://mp.weixin.qq.com/s/6J2wk-1yJiBAYEdbqzOMug. There are a few minor issues in the drawing based on my personal understanding, for reference only! 1. Please pay attention to the place where the red line is drawn. If the hole position does not match, do not follow the drawing.
2. Stroke If you use two leather ropes to tighten the two holes of the red line as shown in the video, I don’t think you should drill them.