Chinese are actually the least hive minded culture there is. We have to force it with authoritarianism just to get everyone on the same page. On some qualities where Chinese people do conform, I can list general topics like education, educational preferences and beliefs, and career choices. That's literally it for me. When it comes to politics it varies greatly. Even when it comes to money spending patterns and resource allocation, it varies greatly between individuals. Behavioural patterns are too unpredictable so politics are almost forced with an iron fist.
An genuinely hive minded culture that developed from whatever set of circumstances (may be out of social forces as opposed to forced political ones) is Japan. They also have are far more homogenous society than China and have FAR fewer ethnicities and social division than China.
One cognitive cause I suspect for believing Chinese are conformists is because of the association with Japan or other Asian cultures that are actually hive minded and conformist. Combine that with how our looks converge more than caucasian physiology where there are a range of hair colour, skin tone, and eye colours. This makes it easier to fool the non-observant mind into believing that yes Chinese culture is wholly conformist. Then you get the racists who call all Asians hive minded but they've never experienced the great varieties in Asian arts, history, or even set foot into an Asian convenience store in China, Japan, or Taiwan just to look at the choices in beverages and flavours alone.
China was united out of many different nations and groups/tribes, with their own language variations and sub-cultures. It's hard to imagine such a non-homogenous nation actually be so involved in a group think that dominates the narrative. The CCP's direction for PRC may provide an illusion of such a thing, especially when dissenting opinions and groups are generally not given media platforms to speak on.