Nearly a decade after its inception, momentum behind China’s sweeping Belt and Road Initiative (BRI) appears to be slowing as lending slumps and projects stall—forcing Chinese President Xi Jinping to again rethink a floundering initiative that he once hailed as his “project of the century.” After doling out hundreds of billions of dollars, experts say China’s lending for BRI projects has plummeted, largely a casualty of the COVID-19 pandemic and the country’s own economic slowdown. Support has also waned as partner countries drown in debt and fractures emerge—literally—in projects, fueling uncertainty about the future of the sprawling initiative. In 2022,...