The World's Oldest Horse Lived in the Same Era as Emperor Qianlong
The average lifespan of horses is 25-30 years, only one-third of a human's lifespan, but longer than many other domestic animals. With increasing levels of horse care today, horses are living longer.
Old Billy, born in Britain, is recognized as the oldest horse ever to have lived. Old Billy was confirmed to be 62 years old when he died. He was born in 1760 in Woolston Lancashire, England, and was a horse that pulled barges on canals. Old Billy continued to work, even in old age with a bent back, until the new canal opened on February 14, 1821, at which point he retired at 61. He died on November 27, 1822.
Old Billy's life was truly a hardworking life!

62 years old, equivalent to approximately 200 years for a human!

There is a great deal of material that has been reported on Old Billy's biography, organized into a series of 'proofs.' This includes paintings by artists, specimens produced, reports from local media, and even news of Old Billy's death in the 1822 Manchester Annual could be found. It can be said that the evidence is conclusive!
A print drawn by W. Tayler is collected by Warrington Museum & Art Gallery
Old Billy lived at the same time as Emperor Qianlong
1760, Old Billy was born, this year is the 25th year of the Qing Dynasty, Qianlong Emperor
1822, Old Billy died, this year is the 2nd year of the Xianfeng Emperor, Dao Guang

Lang Shining drew 'Qianlong Viewing Pictures', Qing,
Because of his age, Old Billy became a celebrity in the local area! Many artists painted him, which later proved to be 'evidence'.

The head of Old Billy is located in the Manchester Museum. It is the collection of the Manchester Natural History Society, which was founded in 1821. Old Billy's skull was one of its initial exhibits at its location on King Street, and it has been displayed ever since!
Old Billy's horse specimen (besides the skull) is at the Bedford Museum. This specimen was donated in 1932 by auctioneer Harry Pickwoode. It is said that the society was in financial difficulty at the time and sold this specimen, so the skull and specimen were not in the same museum.
Of course, horses need several years to fully mature. 3 years is equivalent to a human's adulthood; physiologically, a 5-year-old horse's body will only be fully mature, which is equivalent to 24.5 years for a human, and is in the period of adulthood; a 13-year-old horse has already entered middle age, a 20-year-old horse is entering old age. If your horse reaches 30 years old, then pay attention, he is in an extremely high-age zone; a few horses that exceed 30 years old are absolutely called 'longevity horses'. A 36-year-old horse is equivalent to a centenarian!
If you are in Britain or planning your next British trip, you might want to visit these museums to take a look.