Career
Some of Xu"s work is controversial. He has argued in research papers and symposiums that the issue of sovereignty over Okinawa is unsettled. His view is that the approval of the Qing Dynasty of China was needed when Japan abolished the Kingdom of Ryukyu and set up Okinawa Prefecture in 1879.
A series of historical events are highlighted by Xu"s argument, including
the abolition of the kingdom by the Meiji government in 1879
United States control over Okinawa after World World War II
Okinawa"s reversion to Japanese sovereignty from United States occupation in 1972.
Xu"s work supports China"s right to claim Okinawa as part of the People"s Republic of China.
