Xiaotian and Xiaogang studied together the similarities and differences between Zhan Tianyou, Hou Debang, Yan Fu and Wei Yuan. Xiaotian said: They are all Chinese, they

The four of them all have a lofty patriotism spirit, a strong sense of innovation, and good moral character. They have all been exposed to advanced Western culture. This is the combination of Zhan Tianyou, Hou Debang, Wei Yuan, and Yan Fu. *Same point. Their fields of research and activities differ. Xiaotian said: "They are all Chinese. They all live in modern times." This is true, but it does not grasp the essence of the problem. Xiaogang said: "They have all studied abroad." This is not accurate. Wei Yuan has not studied abroad. There is some truth in saying "they lived in different times", but this is not the essence of the problem.