China and the United States have spent much of the past few years managing tariffs, export restrictions and supply-chain disputes through rounds of high-level negotiations. The latest talks point to a different approach: building more permanent channels to deal with those disagreements.Following economic and trade consultations held in New York and Washington from September 20 to 23, China’s Ministry of Commerce announced a series of outcomes covering tariffs, investment, agriculture, artificial intelligence, financial services, coal and air travel.Also Read | The US-Iran war is now squeezing two major shipping routes from Strait of Hormuz to the Red Sea — here’s…