The "comfort women" thing has a way of staying in the news because Japanese politicians like denying it.

this could be about abolishing sex trafficking.

Copying part of my comment from elsewhere: I don’t think being conservative (in the sense of reserved) should be mistaken for being reactionary. Pornography, as it exists in the world today, is a huge market for nominally illegal forms of porn, particularly involving minors and non-consenting parties of various kinds (intoxication, voyeurism, revenge porn, trafficking, etc.). These things are difficult to account for and may require systems more sophisticated than China currently has.

Does that mean the specific policies they have now are completely correct and rational? Probably not, just more points to consider.