More than 10 people reportedly missing after letter was published on Chinese news website early March

Since taking office three years ago, President Xi Jinping has concentrated more power in his hands than his recent predecessors. Photo: Reuters
BEIJING—A Chinese news portal’s publication of a mysterious letter calling for President Xi Jinping’s resignation appears to have triggered a hunt for those responsible, in a sign of Beijing’s anxiety over bubbling dissent within the Communist Party. Continue reading