The blow pump told you to shut up.

Cause and solution: the pump mouth may be blocked after the manufacturer produces it. You can use a screwdriver or a silver needle to pass through the pump mouth and then you can go out, or you can use a screwdriver to chew it out and make a hole in the blocked place, and then you can exhaust. If you go out with a pump, you can stick a hole with a silver needle instead of an air outlet, and then you can pump up.