To speak to Wan Chin, the host of a YouTube politics show, is to hear echoes of American conservative radio: An “invasion” of immigrants is crossing the border, filling public housing and sapping up limited government resources, he told me; the coronavirus is a “Frankenstein” superbug weaponized in a Chinese lab; and President Donald Trump’s “Rambo way” of leadership has finally called out China for its hostilities. When Trump was diagnosed with COVID-19, Chin took to Facebook to wish him “a speedy recovery from the mild flu,” parroting the president’s own downplaying of the virus’s severity. Chin isn’t an American shock jock, though. In fact, he doesn’t even live in the United States. He is, instead, an early and prominent advocate of Hong Kong’s prodemocracy movement: His 2011 book, On the Hong Kong City-State , was a formative text for the localist movement , which seeks to promote and protect Hong Kong’s identity and way of life, separate from that of mainland China. Chin, a forme...