[Hi, Hello, like 8 people wanted more of what I wrote about Strange Omega Qinghua so I guess I'm delivering on that]
To Shang Qinghua, scenting is a useless phenomena.
He understands it theoretically. It's the process in which an item is marked with the pheromones of an individual to indicate an underlying social context.
The problem is, he has no idea what it's actually like.
Despite his omega status for his secondary gender, he has never actually participated in the process. Being scent blind, the smell of pheromones is something he is unaffected by, and as something that's so key in the use of social interactions, it forces Shang Qinghua to really be able to understand other cues to give a tell on how things work.
For the major characters, he doesn't need a tell. He has wrote them down with painstaking detail, dedicating chapters and paragraphs and enough words that it would make a novel feel like a drabble in comparison. He can see the twitch in Liu Qingge's hand whenever he wants to hunt, the movement Shen Jiu's fan does when he's pissed, and the way Yue Qingyuan's smile becomes a little more lifeless whenever the Qing Jing Peak Lord passes him silently.
For the characters he didn't write, he sometimes fumble. He can't smell them sometimes when they hide their anger but after years of practice, he can tell when they're mad.
It was what made him advantageous when it came to deals. Though he could never tell when a merchant was happy with the deal or not, he would be unable to be intimidated by scent. The scent of particularly aggressive suppliers who uses their scent to pressure their business partners into agreeing to a more lucrative agreement find trouble with Shang Qinghua, he simply sits casually, as if the room that is heavily intoxicated with the scent of danger was only a figment of your imagination.
But scenting itself is an instinct, an instinct that Qinghua does not have. Sure, he can emit pheromones, but it's a rocky attempt at best, and uncontrollable at worst, with the scent of these pheromones coming out at random with no clear way to start or stop. Scenting is an intentional process that relies on a person's innate ability to imbue an object with the smell of them.
It's not like he can smell it anyway.
It's why, despite his Omega status, he has never shared his scent with other omegas. it would be impossible to properly practice normal omegaverse customs without the capabilities to do so.
In my idea of the Omegaverse, people give and mark their scents to each other regularly to indicate their belonging to a pack, whether it be something such as a family, or an organization like Cang Qiong. Many have tried to gift Shang Qinghua these in the form of pillowcases, robes, or accessories.
But ignorant to his own place in the world and the way people feel about him, he takes this as his role on An Ding to be inadvertently assigned as an outer disciple in charge of the laundry; and being charged with the task of becoming the Peak Lord of An Ding by the system, he swallow his pride to take it in stride, washing vigorously and returning them back to the person in pristine and sterile condition.
This has caused strain and even a punch to the face for Qinghua, with him wrongly assuming it was simply his destiny to be mistreated. Of course he's treated like dirt, ut's probably why he became a traitor in the first place. Time passes, and he slowly gets less and less of these gifts and continues his unprecedented distance to the people of his peak.
Maybe it was why it was so easy for the people in the caravan to throw him to the man who would one day be his demise, a sacrifice for a world that values the people of their pack so highly, that seems to place such a significant weight over protecting their own.
(He hears the whispers that pity him, that suspect him, that makes guesses on why he survived, all of which center around his distance. That the demon had came for Cang Qiong specifically and his detachment gave him an out to lie about his allegiance and pass himself off as a bystander who was just unfortunate enough to be there. He seems pitiful enough, why not let him live.)
Maybe it's also why Mobei-jun has such a hard time trusting him for so long. You would assume from a man that said he would dedicate his entire life to you, that he would give everything to be your servant, he would be unashamed in being part of your pack. That he would show a visible attempt at indicating that. Pride for your pack is important in such a territorial world.
He's grated that his subordinate seemingly refuses to show his loyalty by keeping his scent, that whatever he has marked will be scrubbed into sterility.
(Shang Qinghua was once asked by his fellow disciple what that scent was, and it clicked pretty fast that Mobei-jun was marking his things. He stays up late and scrubs and replaces everything regularly, praying that the system gives him a hand if it wants the plot to stay on course.)
