Thank you NeuroticFish, NotATether, LoyceV, Dave
the wallets I am going to check is air gapped cold wallets, and will not do any transaction shortly.
thus, I do not mind the latency of days, I only check maybe once a month.
what I am using now is Master Public Key in electrum.
what I concern is about security and privacy.
May be I am paranoid, I just feel more comfortable to check the balance offline, and make sure the coin is in there.
From my research, it seems able to check the balance with the whole blockchain without internet.
I am very familiar with the blockchain and Bitcoin core.
Just want to konw is the blockchain possible transfer to another computer.
especially, from windows 10 to raspberry pi os.Oh god, I think this dump able to compromise my paranoid for now, and seems much much easier, Thank you!