Why cats love to climb to high places:
1. Status symbol: Height is a symbol of status. If there is more than one cat in the house, the cat that occupies the highest position is usually the most powerful cat in the house.
2. Concealment: Height provides cats with a better field of vision. From a higher position, cats can more easily observe the actions of other people or animals within their territory. In the wild, being at a high position makes it easier for cats to conceal themselves and avoid being spotted by prey.
3. Warming: In colder regions, cats will choose warmer places to keep warm, such as above the refrigerator or cabinets near the radiator. These are places they find warm.
4. Avoiding threats: If something frightens a cat, it may try to hide in a high place. For example, if there is another dog in the house, a higher place will make the cat feel safer and away from the scary thing. 
Methods to minimize cats' climbing heights for their safety:
1. Use treats to lure the cat. Whenever the cat climbs to a high place, he will take out treats to lure the cat down, thus leaving the cat with an association memory of "coming down = treats".
2. The simplest way is to "shout loudly". Whenever you see your cat climbing to a high place, you should shout loudly. Over time, the cat will remember that there is a certain place it cannot climb.
3. If you have double-sided tape at home, you can stick it all over the cardboard and place it in a dangerous spot where your cat often climbs. After using this method, your cat is likely to step on the cardboard after climbing up, and a sticky sensation will travel from its paws to its brain. The cat will feel very uncomfortable with this sensation and eventually stop climbing there.