Jump, jump, jump, jump down to the ground; (teacher at Dongshan Higher Primary School)
Fly, fly, fly, fly up to the sky.[1] (Mao Zedong)

[1] This is a couplet exchanged between Mao Zedong and a teacher at Dongshan Primary School. In the autumn of 1910, Mao Zedong came to study at Xiangxiang Dongshan Higher Primary School. Once during class, the teacher forgot to bring a teaching tool and left the classroom to get it. Seeing the teacher leave, Mao Zedong ran like an arrow to the rostrum, leaped onto it, and, imitating the rebellious figures he had read about in books, began to give a speech to the class. Suddenly hearing footsteps outside, he hurriedly jumped down and slipped back into his seat. The teacher returned to the classroom, scanned everyone sternly, and then said, "If no one can complete my couplet today, I will investigate who it was that damaged the rostrum just now!" He recited in a loud voice: "Jump, jump, jump, jump down to the ground." Everyone looked at each other amid dead silence. Only Mao Zedong was heard to respond with the matching line: "Fly, fly, fly, fly up to the sky." The teacher forgot his scolding and couldn't help but exclaim in praise, "Good! 'Fly up to the sky' is good!"