The CPU fan is plastic, brought by Intel. The insertion is unstable after dust removal.

I suggest you go to the repair shop and say that CPU silicone grease is dry and let them install it for you. It will cost you only a little money.

I'll tell you why, if you don't install the fan yourself, the fan legs are plastic and easy to break. If it is not installed properly, the CPU will not work normally, resulting in the machine being unable to start, or automatically shutting down after an hour or two. If you can install it, but you are not skilled, it is very troublesome to disassemble the motherboard and install the fan.

I hope it helps you.

I can install it, but I can't teach you, because repeatedly plugging and twisting the fan will damage the fan, which is not cost-effective.