That's Chinese cultural arrogance, and it's a flaw they've had ever since they were a civilizational "top dog". Ancient art works of theirs had anyone and everyone but Chinese people ("barbarians" and "foreign devils") look like Gollum stereotypes, right down to rounder eyes being made to look demonic in some way (the statues and paintings are hilarious).
The problem is that they're not "top dog" or even in the top five anymore, and they haven't been for centuries. When they had their proverbial teeth kicked in twice during the Opium Wars, it should've been a major wake up call; same with the Boxer Rebellion at the turn of the 20th.
The CCP simply used and exacerbated that arrogance until it corrupted everything; from civilian life to business and goods.
Regardless of their history or why they have such arrogance, what matters is the here and now. The world moved on past them, surpassed them, and they still think they're in the past just because they can thieve, deceive, mass produce crap, and bluster.
And, ironically, in doing so they've become the same barbarian stereotype they've railed against in the past.
Frankly, China needs to be bitchslapped and made to realize their place in the world isn't a top dog like how the British Empire was in the past, how the Soviet Union and America was and is respectively.
They're a second-rate power at best, on a good day, when it isn't snowing in Hell.
I used the scrawny kid analogy for a reason: Their economy is a propped up pyramid scheme barely holding on, massive civil unrest is brewing underneath the surface, their military is a joke and their hardware is laughed at as being "cheap, Chinese crap" for many reasons, and their buildings and infrastructure are literally falling down over their heads.
Let's not forget their land has become so polluted because of their cultural arrogance and stupidity that it's all expies from post-apocalyptic films like Mad Max.
Although, the Mayweather thing is a little true: They're a scrawny kid that looks like Mayweather. They're still a scrawny kid, though.