A sealed cutting knife usually needs a flat mouth and sharp edges on both sides, as shown below. It is difficult to match the heart and hand with any other blade style. Therefore, the stone carving chapter only uses the blade angle to enter the stone, and then pushes the carving knife to run smoothly between strokes. In the process of running, it got the help of the blade, which cut off the stone and made the stone chips fall. In fact, the stone chips fall completely by the blade angle, which only leads to the direction. If you carve a stone with a bevel knife, after the tip of the knife enters the stone, a punch will sink deeper and deeper, and it will be difficult to transport it in at last. Knife cutting is often used for seal cutting. Only the flat knife can "cut", and the oblique knife cannot be used. The cross section of double-sided flat-headed knife is isosceles triangle. Only in this way can the two edges be used alternately and can swing freely inside and outside or left and right. If you use a single-edged meat cleaver, there is no such maneuverability. Style also includes the thickness of the knife and the length of the handle, depending on your own habits and creative needs, and don't force unity.
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