1998年中国社会科学院中国近代史所中华民国史方向的研究生臧运祜通过了博士论文答辩。他论文的题目是《七七事变以前的日本对华政策》,论文中他使用了能找到的大量的档案文献,把研究和分析完全建立在对第一手材料的分析和使用上,受到了专家的好评,并在当年被评为全国为数不多? In 1998, Zang Yun-yun, a graduate student in the history of the Republic of China in the Chinese Modern History Institute of Chinese Academy of Social Sciences, passed the doctoral dissertation defense. His thesis, titled “Japan’s Policy Toward Japan before the Incident of July 7”, uses a large amount of archival material that he can find to establish his research and analysis entirely in the analysis and use of first-hand materials, Experts praise, and was rated as one of the few in the country?