According to the statistics of China Construction Machinery Business Online, the total roller sales volume of the major 21 road roller manufacturers in China is 1,616 units in April 2012, among which 365 units are exported. In details, Henan province ranks the first, 100 units. In the 21 manufacturers, XCMG ranks the first with the sales volume of 255 units. In terms of the tonnage, the 20t single drum mechanical roller counts most, 281 units.