The common sense of car keys that drivers and friends should know when unlocking in Laiwu, Jinan.

　　1. What is a secondary key? High-end cars have a primary key and a secondary key, and the secondary key cannot open the trunk and glove box. If you repair a car or lend it to someone else, put your personal belongings in the trunk, lock them with the master key and give them to the other party, so that others can’t move what is put in the trunk.

　　Key code: after buying a new car, the hand card on the key must be kept well. It is the key code of the car. If the key is lost, you can use it to make a new key.

　　3. Material of the key: the key with good material is alloy, and the ordinary key is copper. In use, the service life of the key with good material is 5-6 times that of the ordinary key, and the wear of the key with good material and the lock cylinder is basically synchronous.

　　4. Use of trunk: There are two ways to open the trunk of high-end cars, one is to open it with a key, and the other is to open it with an electric switch. Be sure to keep both of them open. If one of them is no longer usable, it should be repaired as soon as possible. Never use a key to top the lock cylinder when opening the trunk, otherwise it is easy to fold the key in the lock. Also, don’t put the key in the lock cylinder and close the trunk, as it is easy to break the key.

　　5. Common sense: Pay attention to the use of car keys, don’t hang too many keys or heavy key chains, and keep the weight of the keys. Because the car will bump up and down during driving, it will reduce the service life of the key and lock cylinder for a long time.