ICBC is one of the largest banks globally, with assets reaching trillions of dollars, that makes them a bank that has quite a good reputation globally and with their "positive" statement on Bitcoin and Ethereum it may be a sign that they are not completely closed off by developments from the crypto market. It's just that they are limited by Chinese government regulations and I am sure that there is something positive about their statement, since ICBC is majority owned by the Chinese government and it is impossible for their statement to be issued without the Chinese government considering it, so there is no need to be surprised that Maybe in the future China will open up to crypto trading or ETFs.
Them comparing BTC to gold is not a new thing, so that is something that shouldn't surprised us anymore, though it's also possible that you only read it first here, and that is why you feel positive about it. As for ETH, I'm sorry to say this but I find it funny when they considered it as a digital oil. LoL, really? But why that?
It's not awkward for BTC to be called as a digital gold because they had some similarities and for ETH, maybe it's better if they called it as a digital silver. China was once open to crypto but they only banned it, though I also believe that they will support it again. There is no need for them to abandon gold since, gold still has its own charm.