pidw! liu qingge regresses from the point of death all the way back to the point where he was a disciple
the thing is, shit is Different
he's like, 15, a disciple, and shen jiu has only barely followed yue qingyuan back to the sect
and the thing is, shang qinghua is Different.
it's not that liu qingge was ever like, besties with qinghua. the two of them maybe went on a few escort missions and attended meetings together, but they were never close
airplane doesn't have an ooc lock.
why would he? for shen yuan, of course 'shen qingqiu' can't change personalities 100% over night, that's gotta be a gradual shift. and shen jiu was a fairly major antagonist in the original book. he had a prominent role. and his personality was a huge part of fulfilling that role.
shang qinghua on the other hand? his position in the story is so irrelevant that the system would have let him kill mobei jun. he's a one note villain. barely spoken of, barely written about. airplane himself barely knows the guys actual personality, bc literally this character only existed to betray the sect and then die off screen. shang qinghua, in the original pidw, shang qinghua was as irrelevant as qin wanrong. such a pointless character that you, my dear reader, prolly had to go look her up because you forgot she existed.
all of that to say, the system had absolutely no reason to enforce ic behavior onto airplane. only that airplane had to commit to certain missions. even if the system had tried, airplane doesnt even know this dude well enough to pretend to be him.
and what would be the point? no one in this world has ever met the original shang qinghua.
except for the regressed liu qingge.
and heres the other thing.
airplane isnt like... changing the plot as dramatically as shen yuan did, but he IS changing the plot. just literally by existing. by being a strange aberrant person who wasnt there initially. by doing things that airplane would do and not doing things that og!shang qinghua would do. it's a drop in the bucket, change wise, but it does change shit. it does effect the people around him and how they behave.
so liu qingge's first suspicion is that perhaps shang qinghua also regressed backwards in time. it would make sense. it's not like liu qingge is acting like himself. he's not the same person that he was as a teenager.
but.... shang qinghua isn't acting like the adult shang qinghua that he knows either. in fact, his behavior is COMPLETELY different. like that is a whole ass different person. liu qingge isn't the most observant guy on the planet, but he's not BLIND. this shift is as dramatic as the difference in personality between wei wuxian and lan wangji. that is NOT the same fucking person.
so now liu qingge is investigating airplane, because he is absolutely not about to sit there and let some skinner demon wear his shixiong's skin or whatever the fuck is happening
and see heres the second stressor that liu qingge is dealing with:
shen jiu tried to save his life. he failed. he failed spectacularly. but the person he thought was the worst scum ever had tried so desperately to save him from his qi deviation and that's not exactly something you brush off
and even more so: liu qingge is no longer a dumb teenager.
when liu qingge was an actual teenager, he was busy with his training and overall, just a dumb kid. and look, it's not like he grew up to become a super genius or anything, but he's not as wrapped up in his own bullshit as he was as a kid.
so when liu qingge met shen jiu for the first time, the real first time, he didn't see any of the signs. he saw a snappish and angry person who treated yue qingyuan like shit and clearly got a nepotism hire and had no morals and looked down on everyone and just all of shen jiu's actual flaws.
this liu qingge tho? he's been a peak lord for years now. he's seen shit. he's been places. he's no longer a fairly sheltered young master who has no idea what happens in the real world.
and it only takes one good look at shen jiu to make it obvious just how much abuse he's endured. he hasn't had years to learn how to conceal his trauma better. he doesn't have the cultivation level yet to fight for himself. he's just an abused ex-slave with trauma practically roiling off of him in waves and liu qingge, as an adult, is sitting here absolutely baffled as to how his teenage self missed every single sign
so now he's paying more attention to both shen jiu and airplane, because holyfuck he might have been partially wrong about shen jiu literally this whole time, and because that is NOT shang fucking qinghua. and shen jiu hates him just as much as before, because trauma, and he notices the unnatural attention directed at shang qinghua so now shen jiu is paying an unnatural amount of attention to shang qinghua
which would be all great and magical and fine if shang qinghua wasn't currently hiding a recovering ice demon in his leisure house