First, if he wants to buy, he can sell it to him, but like the price you sell to others, he has priority. (considering the neighborhood feelings for so long)
Second, you can not sell it to him, but sell it to others, and he has no choice. You can read any law you want. There is no key list of transfer requirements.
Third, you have to find out the nature of your house.
If it is rural, it will not be able to pass the household, because there is only a building permit in rural areas, and it is not allowed to transfer ownership. No real estate license.
If it is a commercial house, as long as you reach an agreement with the buyer to pay you the house price, the transfer fee will be agreed by which party, and then both husband and wife will go through the transfer formalities with the certificate and the buyer at the Housing Authority. (mainly the wedding photos of both parties, household registration book, ID card, real estate license, and the form to be filled in when going to the Housing Authority) This is the main procedure. It has nothing to do with neighbors.
Fourth, for people like your neighbor, you don't have to be afraid at all, just use one trick: just ignore him. No matter what he says, you just have to smile, and there will be no direct conflict with him. After all, when your house is sold, people will leave, which is unnecessary. If you have a conflict with your neighbor, it will affect your selling house.
Fifth, if you really don't feel at ease, you can go to the local housing authority to ask what procedures you want, and you can hurry up when you transfer. But the premise is that your house is not a rural self-built house.
Sixth, if there is anything unclear, please continue to ask questions.