What level of wind can't take off and land?

According to the weather network, the wind speed below level 5 has no effect on the take-off of the plane, and the strong wind of level 6-8 depends on the wind direction. It can take off against the wind and add power to the plane. When the wind is downwind, the main engine (such as Boeing series) can extend the runway takeoff. Small and medium-sized aircraft will be affected by wind speed and cannot take off; The crosswind will make the plane deviate from the center line of the runway, so it can't take off, and all strong winds above level 9 will be grounded.