FILE - In this Nov. 4, 2019, file photo released by China's Xinhua News Agency, Chinese President Xi Jinping, right, poses with Hong Kong Chief Executive Carrie Lam for a photo during a meeting in Shanghai, China. A sharp escalation of violence in Hong Kong has once again raised the question of how China's central government will respond. Experts said national security measures and deployment of the armed forces remain possibilities, though Beijing may just as likely allow destruction to continue unfolding. (Ju Peng/Xinhua via AP, File)
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