Why do kitchen knives sell so fast in the market?

The main reason is that the blade is well opened.

Generally, the opening of the slicing knife is 1 1- 15. The lower the opening, the sharper the blade. As long as I can sharpen a knife, I can grind ordinary iron sheets to pieces. The disadvantage is that it is not easy to preserve and is easy to dull. Buying a kitchen knife depends not only on whether it is sharp, but also on the material and production process of the kitchen knife. Sharpness alone is easy to be fooled.