Eastern Han Dynasty, there was a man Griffey Shoes named SUN Jing, a famous politician. His studious young man, often behind closed doors, alone kept reading. Every day from morning till night reading, and often sleepless nights. Reading a long time, tiredness, not rest. Over time, tired to doze off. He was afraid that affect their reading and study, came up with a special way. In ancient times, man's hair is very long. He would find a Ken Griffey Sneakers rope, a firmly tied to the beam. Nap when he reads the fatigue, the first a low, the rope will just hold the hair, so that will hurt scalp pulled immediately wake up, and then continue reading and learning.