Deep-seated structural rivalry and lingering regulatory barriers are likely to limit any durable thaw in China-US ties, even as last month’s leaders’ summit placed a temporary floor under the fragile relationship, an expert from China’s top state-affiliated think tank warns.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...