According to the statistics of China Construction Machinery Business Online, the overall sales volume of the major 20 road roller manufacturers in China is 642 sets in January 2012, among which 156 sets are exported. In details, Henan province ranks the first, 41 sets. In the 20 manufacturers, XCMG ranks the first with the sales volume of 139 sets. In terms of the tonnage, the 20t single drum mechanical roller counts most, 134 sets.