legal advice

If there are relevant clauses in the contract, it proves that he is obliged to transfer the transformer to you. As long as the contract is legal, you can ask him to assist in the transfer procedures. He either transfers the ownership or breaches the contract, and you can go to court to sue. If necessary, you can send your contract to my email, and I will take a look at it for you. My email address is ztylgood @163.com. I wish you all the best and the whole family is well!