A foreigner studied Chinese hard for 10 years, went to China to take the grade examination and handed in a blank sheet of paper. Why?

Because the title of the grade exam is as follows:

Please explain the meaning of each of the following meanings-

When A Dai gave the leader a red envelope, the conversation between them was very interesting. Leader: "What do you mean?"

A Dai: "It doesn't mean anything, it means something."

Leader: "You are not interesting enough."

A Dai: "Nothing, nothing."

Leader: "You are really interesting."

A Dai: "Actually, there is no other meaning."

Leader: "Then I am embarrassed."

A Dai: "Sorry."

The foreigner burst into tears and returned in vain.

Thanks to San Dou. Provide ideas.