first off i liked the live action 100 times better than the manhua, donghua, novel and even parts of the audio drama. second its fiction people can write whatever they want with it even if it goes against what you or the author think i personally do get uncomfortable with switching top/bottom in fiction but i move on cause its unimportant. also the way their relationship was in the live action was much more intimate and beautiful, just cause it doesn’t show or say anything explicitly stating their relationship, that doesn’t take away anything
i dont know if you know this but china has censorship laws so even if they tried it wouldn't have been able to air if it was an explicit romance