One could argue Americans are also slaves. Spam lists like this one. Japan is another Asian society with extreme workloads but they don’t get these comments.
The standard of living has massive increased in China over the last 50 years. Their population has been worked to the bone, but it didn’t just lead to nothing. We deem China to be almost a first world country. Often slightly worse but on the upper end of the second world. The rail infrastructure part is an example of what it did achieve which is why it’s weird to “China bad” on that specific post.
Nonetheless I’d rather have seen a discussion than the mods just banning you.