US ambassador says Trump told Xi any Chinese help to Iran is 'totally unacceptable'

U.S. Ambassador to China David Perdue told CNBC that President Trump reiterated to Xi Jinping that any direct or indirect Chinese help to Iran, including intelligence, parts or military equipment, is unacceptable. Perdue said Washington believes China has given indirect support to keeping Hormuz closed but has no direct evidence.

Why this matters. China is Iran's largest trade partner and has refused to help enforce U.S. sanctions, so its stance shapes how long Tehran can hold out on Hormuz.