Upon hearing this, Wu tried and tried again. He adapted and improved upon his traditional carving tools. He started to carve and whittled the wings down to 0.02 millimeters (only a third the thickness of a sheet of paper) with veins on both sides. The sense of the hard shell under the fine hairs he also portrayed convincingly.
聽後他一試再試，將傳統雕刻刀稍加改良後，開始挖，把蟬翼的厚度挖到只有○・○○二公分，厚度只有報紙的三分之一，兩邊脈絡一致，蟬身細毛下的硬殼質感也表露無遺。