The Communist Party of China has pledged to vigorously crack down on the “unwritten rules” that enable corruption in the party, deepening its long-running campaign to keep officials in line. At a Friday press conference, senior officials described the important takeaways from the 20th Central Committee’s Fifth Plenum, which concluded the day before. They underscored President Xi Jinping’s assertion that corruption remains a serious challenge that requires sustained pressure and targeted action...