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 844 units in December 2012, among which 278 units are exported. In details, Jiangsu province ranks the first, 54 units. In the 22 manufacturers, XCMG ranks the first with the sales volume of 198 units. In terms of the tonnage, the 20t single drum mechanical roller counts most, 143 units.