Having lived in Beijing myself in 2014, most hutongs are not comparable to Indian slums; some might be. But there are definitely problematic housing situations for migrant workers, even now. Many live in dangerous conditions, if not slum-like conditions, though some would consider these to be slums (certainly, many would agree that these properties are run by slumlords). At this point, we are quibbling about the meanings of words, when we should really be focused on whether people can live healthy, safe, and productive lives on their current salaries.
http://www.scmp.com/news/china/society/article/2098843/tales...
https://www.huffingtonpost.com/entry/underground-basement-ap...
https://www.npr.org/2014/12/07/368760646/a-universe-beneath-...
the author say something you'd like to hear then you instinctively think it's logic. Given that this is a complaint I have about many people, it is an interesting feeling to have someone else have this complaint about me.
In both of your comments, you say that someone is wrong, but don't offer any detailed examples of why someone is wrong. You state, "This is not an essay, I have no time to write too much." But this is Hacker News. If you read through many of the discussions here, many of the comments that get upvoted the most are actually essays that go into a lot of detail, logic, and evidence to explain each writer's thoughts. And those essays are appreciated because they elevate the discussion so that everyone learns something new.