Locks were born in tandem with private ownership and their purpose was to protect their property against theft. The three-spring lock has more than 20 kinds of key options, there are more than 80 kinds of cam turn locks, and the key number of the pinball lock reaches more than 2,500 kinds. The improved key lock of the pin lock can reach 1 million kinds. Obviously, the locks in this period were based on the replacement level determined by the probability of being opened by a stranger, and the three-spring lock was eventually replaced by a pinball lock.

Probability of this thing is very interesting, even if the probability is one in 100 million, indicating that in the 1 million key number, this lock can still be opened, which shows that the lock is only a relatively safe concept. The locks of this period were collectively referred to as mechanical locks due to the use of mechanical devices.

Mechanical locks are not real security locks. What kind of identification technology is unique? In other words: Only the owner of the lock can open it? Fingerprints and eyeballs have the highest probability of uniqueness. After decades of exploration, fingerprint locks have begun to enter the room. Fingerprint lock is a kind of intelligent lock with human fingerprint as the carrier and means of identification. It is the perfect crystallization of computer information technology, electronic technology, mechanical technology and modern hardware technology. Fingerprint locks generally consist of two parts: electronic identification and control, and mechanical linkage system. The uniqueness and non-replicability of the fingerprint determines that the fingerprint lock is the safest kind of lock among all current locks.

Fingerprint locks are widely used in high-end, privacy applications such as government, finance, insurance, and villas. It relies on biometrics and incorporates high-precision algorithms using software programming. Such locks are collectively referred to as smart locks, or bio-intelligent locks.

In the process of pursuing the ultimate security in the lock industry, a transitional product has emerged - the password card lock (or called: electronic card lock), commonly known as: electronic lock. It turns on the lock by setting a six-digit password, either using the IC card's built-in chip sensor to unlock the lock, or both.

However, during the specific use process, the passwords are easy to forget (or the level of thieves is increased. They use special materials to sprinkle on the surface of the password keyboard. After the owner has operated the keyboard, fingerprints are left on the keyboard, and they are easily stolen according to the fingerprints. (Passwords); card lock cards are easily lost, and electronic locks have been criticized in the current market.

The high-end lock market in China is currently growing at a high rate of over 20% per year, and the future is gratifying. With the improvement of the industrial chain, the upper and middle reaches of the lower reaches of the country are all killing the handcuffs, and the concept has fallen. In the final analysis, the contradiction between the spear and the shield is the basis for consumption and procurement.