One of China’s most important meetings begins Monday, as leader Xi Jinping and other ruling Communist Party elites gather in Beijing to map out the goals for the next five years. The closed-door gathering — known as the fourth plenum — is expected to last four days and will discuss and put the final touches on China’s next five-year plan, a blueprint for 2026-2030. The leaders are meeting at a time of heightened trade tensions between Washington and Beijing and just ahead of a possible meeting between Xi and U.S. President Donald Trump during a regional summit later this month.