“难师”指学生在对理论知识理解上和联系实际思考问题时向老师提出不同的见解。“难师”意义在于：1．有利于培养学生实事求是的作风。老一辈无产阶级革命家陈云曾说：“不唯上，不唯书，要唯实。”学生在求学期间敢于“难师”，不迷言、不盲从、不做唯唯诺诺的小书呆子，利于 “Difficult teachers” refers to the students’ different opinions on the understanding of the theoretical knowledge and the practical thinking of the problem. The meaning of “difficult teacher” lies in: 1. It is conducive to cultivating students’ style of seeking truth from facts. The old generation of proletarian revolutionist Chen Yun once said: “Not only does it matter, but does not only have books but must be realists.” Students dare to “difficult” during their studies. They don’t obsess over words, do not follow blindly, and do not use snobbish nerds.