Chinese domestic media is for the most part trash and it's well understood that it conveys the views of the ruling political class. It has never even pretended to be an unbiased source of information.

As far as the Chinese domestic media threatening to nuke US just any godly day, I highly doubt it and I've never seen this. Their domestic media is much more focused on internal development and accomplishments. It serves the purpose of reminding the people how great the Central Government is, which is the CCP's primary objective. International affairs (even with the U.S) are an afterthought. You won't find nearly the amount of vitriol directed towards the U.S that the U.S media directs towards China.