Your first point of call should be your contract, see what it says in there, it may give a clause on breaking early. If it says you cannot or will be penalized, ignore it, if it says you can then you’re good.
I tried to find some clear law on this in preparation for meeting my landlord and failed, there are laws however nothing concrete that I, or co-workers, could find that 100% said 1 month’s notice = no issue.
You can call the number on Tsui MaMa’s website, they’re very helpful. Don’t bother with the online query or email as they never replied to me. When I called they gave me the lawyers cell phone number and she was extremely helpful.
Before getting too worked up, are you sure there will be an issue?