Check your radio to see if it seeks the stations every 9khz or 10khz (AM)? North America uses a different radio system than China. Some rarios can not set the accurate frequency in N.A.
A example is: in BJ you listen to FM97.4Mhz for easy rock, in Toronto, you have to listen to FM97.3MHz.
The radio needs to be universal (check you manual to see how to switch between systems).