Drama Llama Shen Wei! Of course he thinks the Envoy should be Dramatic to befit his station!

Of course he does. ;__; Zhao Yunlan is too hot to smell of unwashed dude shirt. (T___T) Seriously, I can handle all the things in fanon that bring me pain whatever, but Zhao Yunlan cannot smell bad! YOU CAN'T DO THIS TO ME! *CRIES*

(Seriously seriously, though, while I get what you're saying and can see how you'd point to the state of his apartment, I would actually point to the state of his facial hair, which is of a style that requires a lot of upkeep, and we never see that being less than neat. Zhao Yunlan can do grooming and sometimes chooses very complicated grooming!)

I was imagining more "this shirt was let out to air for a few days, thus making it okay to wear, since it wasn't sweated into much". The amount of sweating people do and the stenchiness of the sweat is sort of variable.

Alternatively, Zhao Yunlan has two identical shirts.