Good you mentioned you are already late to the party, but there are still good and profitable Altcoins to mine like Zcash, Eth and ETC. The main thing is electricity if you can get free or low priced electicity it worth investing in Altcoin mining
Thanks for responding. Yes, like I've said electricity is cheap in China if not the cheapest, so that's not a problem.
I was thinking of using cards with a bigger hasrate but bad energy consumption, but I need some details.
As I said, I am a complete newbie

Just a friendly advice. Always buy the latest version of any moner so that it will fave you more and efficient on electricity. And hire also an electrician for setting if ever you don't have enough knowledge on electricity.