A person in the Song

“I can't understand it. What is interesting about this physical experiment, chemical foundation reaction, elementary school ancient poems, must-memorize 100 Chinese geography, nature and science... Some characters are unclear, and there are large characters.”,Zhao Zheng thought for a moment, and finally nodded: "Summon Yan Shu.",“He was in a coma. The imperial physician said it was blood stasis, with blood vessels in the brain clogged and stagnant. He had woken up for a while, but after regaining consciousness, he found himself blind. Terrified, he fainted again quickly. It is likely that this was caused by the blockage of blood vessels.”。