The main trigger was the appearance of some self-proclaimed objective and rational analysts in the comments section.
They claimed that after listening to Dong's and the duo's ensemble, it was obvious that Dong's performance was weaker.
Among these, the more vehement comments came from a Bilibili user named "I am Cat's Dog."
[Before I say anything, let me put on some armor—I graduated from the Music Academy, and my musical aesthetics are a bit stronger than the average person. Seeing people in the comments hyping up "Dong the hero makes his entrance" and stuff, it's so cringeworthy.