800-820-5555: Fixed telephone call, 24-hour toll-free hotline; 400-820-5555: Mobile phones, fixed phones, 24-hour service hotlines and domestic calls are charged according to local telephone standards (86 must be added before overseas telephone numbers); 02 1-38784800: overseas dialing requires adding 86 before the number. Local calls in Shanghai are charged according to local telephone standards, and remote calls are charged according to long-distance charges.