Step 3: Soften the hand guard and the bottom plate with soaking water, stick them on the shell of the pipa, and smooth and trim them with delicate methods. Step four, glue the back plate, arm plate and cutting piece of the pipa to the shell of the pipa, so that the pipa becomes a preliminary shape. Step 5, according to the standard size of the pipa, install the grade on the arm of the pipa, and then connect all parts of the pipa with prefabricated strings. The sixth step is to adjust the timbre and playing effect of pipa to achieve the best effect. Finally, with the calligrapher's writing tools, write some words on the shell of the pipa to create a sense of history and culture. A complete pipa is ready. It should be noted that the pipa produced by each craftsman may have different timbre, but they all have very high value and cultural significance, and are worth playing and collecting.