Recently, the Beijing police took my brother sightseeing again. Nine days, two guards, chauffeured tours through a national park that’s a World Heritage site, visits to Taoist temples and to the Three Gorges, expenses fully covered, all courtesy of the Ministry of Public Security. The point was to get him out of town during the 2018 Forum on China-Africa Cooperation, held in early September. The capital had to be in a state of perfect order; no trace of trouble was permissible. And Zha Jianguo, a veteran democracy activist, is considered a professional troublemaker.