一向外國人論中國古代學術和文化的,讚揚他的也不外乎說中國在先秦時代的哲学是如何如何,倫理学如何如何,而很少有人說到中國在先秦時代的科學知識是如何如何的。甚至有些充滿着帝國主義氣息的人,硬把中國人發明的和應用到航海上去的羅盤針這一件偉大創作,一筆抹殺,尤為可耻之举。久經帝国主义压迫的我们中国人,於是對於我們古代的科学知識有如下兩種看法:第 The foreigners who have always talked about ancient Chinese academics and cultures, and praising him are nothing more than how China’s philosophy in the pre-Qin era was and how ethics was, and how few people talked about how science was learned during the pre-Qin era of. Even some of those who are full of imperialism are hard-pressed to insist on a great creation that the Chinese invented and applied to sailing the compass. Our Chinese who have been oppressed by imperialism have the following two opinions about our ancient scientific knowledge: