It could have just been an awkward send out, and there are some people living in China saying they haven't received the notification, so the scale is yet to be determined.
For this kind of thing it is important for us to hold fire if the details cannot be substantiated, to prevent excessive enthusiastic speculation.
At the very least, do PLA watching a favour and don't post this kind of stuff on places like LCD on Reddit when there is little of substance other than "a possible large scale push alert about a bomber unit was done, but we don't know much else". Other places will rightfully ask for receipts and if you can't show them then you end up giving PLA watching a bad name.
Sometimes if news cannot yet be determined to a given level of concreteness, and if it comes across as too self congratulatory, then it is better to avoid spreading it elsewhere.
