Professor Joseph Nye speaks during an interview on the sidelines of a forum on "China's Economic Development and China-U.S. Relations" held at Harvard University, Massachusetts, the United States, Oct. 15, 2018. The U.S.-China relationship, though currently encountering some difficulties, is "bound to be cooperative" in the long run as there are so many global issues that could not be solved unless the world's largest two economies work together, Joseph Nye said.