There is a joke about foreigners taking the Chinese test, and it’s about “meaning”

A foreigner studied Chinese hard for ten years and went to China to take the Chinese language test. The test questions are as follows:

Please explain the meaning of each "meaning" below.

When Duan gave a red envelope to his leader, the conversation between the two was quite interesting.

Leader: “What do you mean?”

Dumb: “It’s not interesting, it’s just interesting.”

Leader: “You’re not interesting enough. ."

A-Dai: "It's a small thing, it's a small thing."

Leader: "You are really interesting."

A-Dai: "Actually, it doesn't mean anything else. ."

The leader: "Then I'm sorry."

A-Dai: "I'm sorry."

The foreigner returned home in vain. Already...