The violence is there to underline the severity and cruelty of what it symbolizes, namely the current overly capitalistic…
perfectly said as the director/creator himself acknowledged, the point of the violence is to draw attention to the downsides of capitalism and provoke outrage. Without the violence, the message of the show may not have resonated with viewers.
As a Chinese ethnic person, she looks Chinese. I'm guessing neither of you have actually been around many Chinese people and just base how Chinese people look from dramas.
https://www.youtube.com/watch?v=MaLjFnd-kuE