The unicycle uses the lever principle to close the resistance point of the load to the fulcrum (i.e., the wheel) to make its operation efficient, and also shares the load on the unicycle and the operator. Because unicycle makes it easy to move heavy or large loads, it is indispensable in construction sites, agricultural land and gardens.

Although the two wheeled handcart is relatively stable on the flat ground, the unicycle has high operability in places prone to imbalance, such as small, planked or raised roads, and is easier to control when unloading.

Since the car only lands on a single wheel, it is not necessary to choose the width of the road surface, so narrow roads, roadways, ridges and wooden bridges can all pass through. This is very suitable for the production and transportation in the tea area. It is also called "line car" because it is a single wheel and the traces left on the ground are straight lines or curves.