Hi buy from china is used
Well, then that is bad news.
Your chances to recover this gear depend on the type of virus and how innosilicon handles the reset stuff, does the control board have a slot of an sd/tf card? if yes then you can probably find the files needed to flash the miner, or simply requested it from their support team, if it doesn't have an sd card slot then you will have to buy a new control board.
Again, I am not 100%, if it was an Antminer I would be confident because I have seen a truckload of those gears, but I have no idea about this T2T, I assume they use a similar firmware and the are subject to being hacked just like all other mining gears, and the first symptom of an infected miner is the inability to change the pool/worker and this is what I based my conclusion on.