DR. Yu Zhaoxiang, my classmate in the same medical school 41 year ago, director of the Department of Neurosurgery at Jingdezhen First People's Hospital, successfully treated a patient with a 17cm sharp knife piercing the brain tissue. The superb surgical skills should surpass the academician of the Chinese Academy of Engineering. Professor Yi Rao just published a paper, which belongs to the useless Goldbach conjecture of 1+1=2, but Dr. Yu's treatment of patients is to solve practical problems and save the wounded!
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