What joke is Wang Xifeng's "The blind set off firecrackers"?

This joke is really not funny. When Wang Xifeng spoke, everyone froze and didn't laugh. Only Wang Xifeng explained that it was getting late and it was time for the deaf to set off firecrackers-let's go, everyone laughed. Because everyone realized that Wang Xifeng's intention in telling this "joke" was to point out that it was time to break up, which not only did not spoil everyone's fun, but also reflected Wang Xifeng's wit and wit.