Notes
The first group:some neighboring countries in Asia (DPR of Korea.Mongolia,
Vietnam,Japan,Rep.of Korea, Kazakhstan,Tajikistan, Uzbekistan,Turkmenistan)
The second group:other countries and regions in Asia
The third group:countries and regions in Europe,the US,Canada,Australia,New
Zealand
The fourth group:other countries and regions in America,countries and regions in
Africa,the Pacific Islands