How often to change razor blades

How often should you replace your razor blades? Mainly depends on the quality of your blade and the amount of your daily use. If the amount of daily blade damage is relatively large, then you can choose a few days a change such as fire, not particularly frequent use of the blade, and the quality of the blade is very good, then you can change a few weeks can be. As long as the sharpness of the blade to ensure that the normal shaving clean beard on it. In summary, hope to adopt.