I actually felt a little bad for Xiao Ziqian during the banquet when the Emperor subtly threatened him about mistreating the Chancellor's daughter. Like, yes he's an ass, but having your sovereign publicly warn you about how to treat your wife must sting. Though he earned it.
Okay, the master's desertion when the Woman in White shows up is both cowardly and hilarious. One second he's standing guard, the next he's on the wall, leaving his disciple to face the headless ghost alone. "A complete betrayal of his teammate!" is the perfect summary. What a terrible partner! But honestly, it makes for a much funnier scene.
The world-building through the protagonist's passive observations is really effective. We learn about Warring States politics, the Qin legal system, the Han court's ineptitude, and the social dynamics of retainers all through his internal thoughts while he's lying in bed. It never feels like an infodump because it's tied directly to his immediate survival concerns. The history grad student in his head is more useful than any cheat system could be.