Hey, Everyone, I'm Looking for a Book. If You Know One, Please Let Me Know. Thanks in Advance!

The protagonist transmigrates with a System into the Qin dynasty or some other dynasty, I forget which. The System gives him one kind of unlimited resource each day. On the first day, it was some kind of healing potion from a video game, I think, something like an energy drink. If anyone knows the title, please let me know. I'd be very grateful. These are a few books I've read and enjoyed. They have sweet romance, comedy, and overpowered but sensible protagonists. Consider them a small token of my thanks.