China has stepped up its onslaught against a US-born school of thought on China’s last imperial dynasty, accusing it of providing “theoretical ammunition” for attempts to divide the country. The denunciation came as online debates over the Qing dynasty (1644-1911) continue to give rise to inflammatory rhetoric, and as Beijing’s ethnic policies and historical narratives are increasingly becoming an arena for international political competition. An article published by the state-run China Ethnic...