hey like I know narrative convenience etc but also like. wenjing glows when there's blood on it, yeah?
Li Lianhua carries that sword for a decade. up his...sleeve? I guess?? just. on him, all the time presumably, because it's the last link he has to his shixiong and also because like. defence weapon. and also also sword he needs to keep hidden and probably can't just leave lying around like he does di feisheng's disco boxer armour scraps, because a sword is kinda less easy to explain as 'haha yeah I just found it and decided to keep it for. reasons?' than 'oh my thrifted jianghu scrap of don't get burnt cooking material is actually valuable? weird! anyway want some inedible soup'
Li Lianhua also, presumably, spends a decade coughing up blood on the regular, because of the whole dying slowly and horribly of poison thing. I'd guess he's coughing up blood probably less at the start/middle of the decade, but like, he's visibly used to just horking up an internal organs worth of blood and then continuing on his way as best he can, so. one assumes the blood spitting is not a new thing.
so like. how often over the literal decade he's carrying the sword that glows when exposed to blood and also regularly exposing it to blood is Li lianhua like hurkcoughbleh and then has to be like please ignore my glowing arm, it's....a medical condition that is extremely normal and not worth talking about, that will be five taels take your treatment and please fuck off