Elevators, also known as lifts, vertical elevators [Note 1]. Commonly known as "䢂" (translated to English lift) in Hong Kong, Singapore and Malaysia, it is a means of transporting pedestrians or goods vertically. According to statistics, in 2002, the total number of elevators in the world exceeded 6 million, making it the most widely used vertical transportation vehicle.

The vertical elevator has a car that runs between atBest elevator company least two columns of rigid rails that are perpendicular or have an angle of inclination of less than 15°. The car is sized and structured to allow passengers to access or load cargo. It is customary to use the elevator as a general term for vertical transportation vehicles in buildings, regardless of the driving method. According to the speed, it can be divided into low speed elevator (less than 4 m / sec), fast elevator (4-12 m / sec) and high speed elevator (12 m / sec or more).
In ancient China and European countries, people and goods were transported vertically by tools such as sputum. Modern elevators were the product of the invention of the 19th century steam engine. In 1845, the first hydraulic elevator was born, and the liquid used at that time was water. In 1853, the American Elisha Otis invented an automatic safety device, which greatly improved the safety of the steel cable traction elevator. On March 23, 1857, a five-storey store in New York, USA, installed the first passenger elevator using the Otis safety device. Since then, the use of elevators has been widely accepted and developed at a high speed. The original elevator was propelled by a steam engine, so the building to be installed must be equipped with a boiler room. In 1880, the German Siemens invented the elevator that used electricity, and the veritable "elevator" officially appeared.