The article makes the argument that it is overtly anti queer:

The law targets “explicit descriptions of gay sex or other sexual perversions”. Heterosexual depictions often have more leeway - works by acclaimed Chinese authors, including Nobel Laureate Mo Yan, have graphic sexual scenes, but are widely available.

Although authors of heterosexual erotica have been jailed in China, observers say the genre is subjected to far less censorship. Gay erotica, which is more subversive, seems to bother authorities more. Volunteers in a support group for the Haitang writers told the BBC police even questioned some readers.