Let me give you a suggestion. You should buy a shaft Taobao first or see if there is a physical store that sells loose shafts.

Then go to the computer city to find a master who repairs the motherboard graphics card to help you disassemble the keyboard welding shaft. Actually, it's very simple, and then it's just welded. If you buy Kaiku, you can mail it to them. Even if it is over-insured, it will be repaired for free, and you will only be charged the 2.5 yuan axle fee.

Or you can buy a set of welding tools yourself. Taobao is very cheap, about 30 yuan, you can buy a set of 14 tools, and then learn to get them back and change them yourself. It's also convenient.