Keys are people’s daily necessities. Over time, the daily necessities of the past have become today’s collections. Keys are mainly made of copper, but also made of other metals. They can be described in various ways and can be roughly divided into the following categories:
Ring key: The ancient Romans wore robes, and according to the custom of the time, robes were not allowed to be pockets. In order to prevent the key from being lost when going out, a ring key is made. After going out, wearing the key on your finger like a ring is both safe and beautiful.
Honeymoon Key: More than 100 years ago, many hotels in the United States had a special key called “Honeymoon Key”, which refers to a honeymoon newly-married couple. They must insert their own keys into the keyhole at the same time To open.
Power-saving keys: Singapore has a well-developed tourism industry and the power consumption of hotels is staggering. Experts have invented a power-saving key that links power on and off in guest rooms and the use of customer keys. When the guest leaves the room, locks the door, and pulls out the key, the power saving device starts to work, which greatly reduces the power consumption of the hotel industry.
“Lock the cold window” key: The earliest key in China was the bronze cast key of the Tang Dynasty (AD 731). Its shape resembles the pane of the ancient Chinese incense pavilion, and is called “lock cold window” by collectors.
Golden Key: In a small museum on the island of Elba, there is one of the most valuable keys in the world. It was a small gold key that Napoleon gave to his beloved wife Josephine. Someone wanted to buy it for $ 20,000, but was rejected.
City “Golden Key”: If you give a visitor a golden key to a certain city, it is a very high courtesy, symbolizing friendship and trust.
