我们对於战国以上的情形知道的很少,所知道的一点大多又经过汉人的修改或解释。所以我们今日看上古时代,都戴著汉人的眼镜。把这副有颜色的眼镜完全脱去或者不易辨到,但我们最少可想法减淡它的色彩,使我们所见的与实情比较相近。顾先生这本书,除直接研究汉代外,就是要达到这个 We know very little about the situation above the Warring States, and most of what we know has been revised or interpreted by the Han. Therefore, we see the ancient times today, wearing Chinese glasses. The pairs of colored glasses completely off or not easy to identify, but at least we can think of it to reduce its color, so that we see and the facts are relatively similar. Mr. Gu this book, in addition to directly studying the Han Dynasty, is to achieve this