I went by hitchhiking through China from Khorgos to the Laotian border and was hosted by several local families in their homes on the way. I have seen more of Chinese everyday life than you have.
Your view of China has been trapped in Chinese propaganda.
And also: I would not say that the Chinese that are living a lavish life with a lot of luxury are living a socialist life. They might be an example of how "capitalism makes people happy", but I don't think that's really correct either.
No nordic country is socialist, though. Having a labour union does not turn a capitalist country into a socialist one. Having a social democrat party does not make a country socialism. It's not "Socialist democratic party", it's "Social democratic party". Their goal is not socialism and they are not doing socialist politics. They are doing nothing to end private ownership of property.