A wheelbarrow is commonly known as a wheelbarrow. Before the popularization of modern means of transportation, it was a portable tool for carrying things and carrying people, especially in the north, and its function was almost the same as that of a donkey.

Unicycle is a new sport, which integrates sports, entertainment and fitness. Students in many countries in the world generally like riding unicycles. The United States, Britain, Germany, France and other developed countries all choose unicycle as sports equipment in the syllabus of primary and secondary schools.

A handcart is a small car driven by human or animal power. The sheep cart and deer cart in the Western Han Dynasty were a kind of handcart. The unicycle was invented a long time ago, at least before the Spring and Autumn Period. Different from later generations, only wooden short columns were used as rollers at first, and then the rollers gradually developed into larger and narrower wheels to adapt to various terrains. Liu Ma, a wooden cow invented by Zhuge Liang in the Three Kingdoms period, is also considered as an improved unicycle to adapt to mountain travel.