He shouldn't have a problem using International driving license, he should be alright, nothing to fear. When I was new here I brought International driving license along with me and use it for 5 months then I met an accident was worried also at the time, but when I get to the traffic police and showed my International driving license they just ackowledge it.

如果您認為我是母狗! 您應該遇見我的媽媽!