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 1,626 units in May 2012, among which 413 units are exported. In details, Jiangsu province ranks the first, 94 units. In the 21 manufacturers, XCMG ranks the first with the sales volume of 258 units. In terms of the tonnage, the 20t single drum mechanical roller counts most, 260 units.