According to the statistics of China Construction Machinery Business Online, the total roller sales volume of the 22 major road roller manufacturers in China is 835 units in October 2012, among which 210 units are exported. In details, Henan province ranks the first, 48 units. In the 22 manufacturers, XCMG ranks the first with the sales volume of 166 units. In terms of the tonnage, the 20t single drum mechanical roller counts most, 121 units.