Since 20 12, construction machinery is no longer listed as a special equipment catalogue (except for a few models such as tower cranes, construction lifts and cranes).
At present, most types of construction machinery, such as excavators and loaders, are no longer special equipment and do not involve special operations, so they are no longer special operation certificates. The quality supervision department is responsible for the supervision function in the field of manufacturing, and no longer handles the operation certificate of construction machinery in the construction site.