The last time I looked at this sort of thing it was claimed that a Chinese phone manufacturer had spying and censorship functionality on a phone that turned out to be part of its ad network. Specifically the phone manufacturer had an ad network that ran inside of certain applications on the phone that they sold access to and they didn't know server-side what an affiliates advertisement was going to be, so they implemented client-side filtering of the advertisements to prevent things like porn adverts and so forth.

Looking through this list, I'm fairly certain that this is something like that because it also includes a bunch of Chinese government entity names that clearly would not be censored in China and also includes a lot of terms relating to pornography.

So the round about point is "88 event" likely refers to a specific string in an advertisment that was once loaded by an affiliate and found to be undesirable for one reason or another and not any sort of specifically political event or similar.