Design the solution of interregional conflict of laws in China. As early as 1983, Mr. Han noticed that the return of Hongkong and Macau and the unification of China would make interregional private law to solve interregional legal conflicts occupy an important position in the field of private international law in China. In addition to organizing scholars from all over the country to study this issue at the China Institute of Private International Law, which he led, he himself conducted in-depth and advanced research on this issue, and made a special speech entitled "On the Interregional Conflict of Laws in China" at the annual meeting of the China Society of International Law held in Beijing in June, 1988, which discussed how the interregional conflict of laws in China occurred as a whole, what are its characteristics and how to solve it. Subsequently, Mr. Han and Professor Han published "Research on Interregional Legal Conflicts in China" in China Social Sciences, which discussed in detail the emergence and characteristics of interregional legal conflicts in China, and discussed the ways and steps to solve interregional legal conflicts in China. From the aspects of integrity, identification, response, identification of foreign law content, public order, legal evasion, personal law, legal application of contract relations and property rights relations, in the early 1990s, Therefore, some graduate students studying for doctoral degrees in Wuhan University have successively completed doctoral dissertations in private international law in Australia, Switzerland, Canada, the Netherlands and other countries.
At the same time, Mr. Han himself has also made in-depth research on American conflict law, Hague Conference on Private International Law and EU Private International Law.