China is claiming the right to punish its critics anywhere on Earth

On July 1, China brought into force its Law on Promoting Ethnic Unity and Progress, converting a decade of Xi Jinping’s doctrine of “forging a strong sense of community for the Chinese nation” into binding law. Most attention has gone to its domestic machinery: entrenching Mandarin over minority languages, unified state textbooks and “inter-embedded” neighbourhoods engineered to dilute concentrations of Uyghurs and Tibetans among the Han majority. In other words, this is an assimilationist…