To prevent the paper from being damaged by the needle, he rounded the sharp tip of the needle (using the same principle as a ballpoint pen) and finally was able to create the Wordless Heavenly Book, which is truly like no other in this world.
為了避免稿紙被鋼針刻破，還應用細鋼珠筆的原理，將鋼針磨到尖中帶圓，終於刻出這本世上獨一無二的《無字天書》。