The Iran crisis loomed large in discussions when Sheikh Khaled bin Mohamed bin Zayed Al Nahyan, the crown prince of Abu Dhabi, and Spanish Prime Minister Pedro Sanchez met President Xi Jinping on separate visits to Beijing last week. Both meetings focused on the need for a comprehensive and sustainable security architecture for the Middle East. This week, on a phone call with Saudi Crown Prince Mohammed bin Salman, Xi reiterated China’s support for an immediate and comprehensive ceasefire and...