Deep-seated structural rivalry and lingering regulatory barriers are likely to limit any thaw in China-US ties, even though last month’s summit put a temporary floor under the fragile relationship, an expert from China’s top state-affiliated think tank has warned. Speaking at the World Economic Forum’s annual meeting in Dalian on Thursday, Zhao Hai, of the Chinese Academy of Social Sciences (CASS), struck a cautious note on the trajectory of the world’s most consequential bilateral relationship,...