The balance of power between the United States and China had shifted in Beijing’s favor even before the war in Iran began in February.

With talks at an impasse, both sides are holding to positions their opponents call unacceptable, while the economic pain caused by the Strait of Hormuz blockade continues to grow.

President Trump said the fragile cease-fire was on “life support,” and India’s leader urged residents to cut back on purchases and travel.

With President Trump’s visit to Beijing looming, China is pushing Iran to negotiate even as its companies export material that could be used by Iran’s military.