It's clearly stated as the official press agency of the communist party on wikipedia, I don't think they're trying to hide it.

Regarding the news itself, it's been talked about quite a lot recently in the Chinese internet space, specifically regarding the case of Wei Zexi. Most of the outrage is directed towards the hospital and Baidu for a) not clearly stating that the search result of that hospital is an ad b) the fact that a hospital can advertise.