You do not understand

When Martin Jiang asked him this, the man hesitated for a long time, not knowing what to say. The person next to him hurriedly whispered, "Idiot! Don't you know Deng Kairui?" "Isn't he from Dadu? He is from Dadu, how...how would I recognize him?" the man stammered. "Are you an idiot? You don't even recognize Deng Kairui? Don't you watch TV? He's a celebrity on TV every day, an expert invited from abroad! He's an authority in our Long country!" The companion next to him said angrily. "This this...." The...