According to the statistics of China Construction Machinery Business Online, the total roller sales volume of the major 20 road roller manufacturers in China is 1,663 units in March 2012, among which 444 units are exported. In details, Henan province ranks the first, 107 units. In the 20 manufacturers, XCMG ranks the first with the sales volume of 246 units. In terms of the tonnage, the 20t single drum mechanical roller counts most, 295 units.