A Chinese student in the U.S. apologized for a commencement speech that criticized China’s air pollution and praised American free speech after she faced a storm of online criticism ​back home.

The incident highlighted how nationalist fervor in China can quickly become vitriolic at a time when President Xi Jinping is pushing a narrative of China’s rise on the geopolitical stage that allows little room for​​ ​ideological​ ​​dissent.

...