The sudden removal of China’s two most senior generals is believed to be a stark warning underscoring President Xi Jinping’s zero-tolerance focus on Communist Party discipline and political purity ahead of two landmark events next year. Beijing announced on Saturday that Zhang Youxia, first-ranked vice-chairman of the Central Military Commission (CMC) and China’s top uniformed officer, was under investigation for serious disciplinary violations, as was Liu Zhenli, chief of the CMC’s Joint Staff...