Google Translate gives me: "Today is the West so-called "April Fool." "Fool's Day" is not in line with our cultural tradition, does not meet the socialist core values, I hope we do not believe rumors, do not spread rumors, do not pass rumors"
And the account seems to be "verified" by Weibo.
And to give you more insights on this matter, I shall use my response from another reply: Honesty and integrity has always been part of the China's cultural tradition and it was only recently added into list of "socialist core values". It is reflective of the general consensus of population on the core characteristics of a Chinese person, and not related to the Chinese government specifically. Hence there is nothing wrong with discouraging spreading of rumours (as NH now correctly named the title of this submission).
Stop the presses, HN also mostly manages to "ban" April 1st from the first page. And never succeeds completely.
After all, Xinhua has traditionally avoided publishing opinions because their main role is a news agency, but with social media there is a lot less restraint than before.