The following is carried out in two steps:
1. Align the yellow sector knob with the cork and tighten it vertically-be careful not to tilt it-until the metal screw can be seen in the center of the lower end of the cork.
2. Slowly and forcefully twist the yellow plastic cover at the lower end of the fan. At this time, the cork will gradually rise from the bottleneck with the yellow plastic screw cover and exit the bottle mouth, and it will be OK.
Please note: you can't give up the second step and pull it out too hard, so it is difficult for people or women with small strength to pull it out; A strong person may simply pull the wire out of the cork, and the cork will not move, just like a slippery wire, and it will not be so useful if it is screwed in.