China's premier warned US officials Tuesday that moves to "politicise" trade issues would prove "disastrous" for the global economy, state media reported. US Commerce Secretary Gina Raimondo is currently on a four-day bridge-building visit to China aimed at better managing tensions between the world's two largest economies. But a meeting with Premier Li Qiang Tuesday saw the top official lay into American trade curbs against Beijing, which Washington insists are necessary for its national security but which China says are meant to clip its economic rise.