BEIJING (AP) — President Xi JInping warned against meddling in China’s dealings with Taiwan during a phone call with his U.S. counterpart, Joe Biden, that gave no indication of progress on trade, technology or other irritants, including Beijing’s opposition to a top American lawmaker’s possible visit to the island democracy, which the mainland claims as its own territory. Xi also warned against splitting the world’s two biggest economies, according to a Chinese government summary of Thursday’s unusually lengthy, three-hour call. Businesspeople and economists warn such a change, brought on by Chinese industrial policy and U.S. curbs on technology exports, might hurt the global economy by slowing innovation and increasing costs.