I have never understood this height problem in C-dramas. It's cinema where they can make you as tall as needed. And it's not the real world where 177 is still slightly above average. Tom Cruise is 168 or 170, Alain Delon was exactly as high as Lou Yunxi and was considered tall.
Well excuse me OP so what if Luo yunxi body structure is like that Atleast he can do stunts perfectly gracefully than those buffed or muscled actors who are awkward in their fighting scenes. Lyx visual is on another level. He can be both handsome and beautiful which you can’t see from others. His acting is so top tier. He’s talented too. And oohhh btw he’s the costume drama god coz he has an ethereal looks and can pass as an elf prince in lotr.