The actual propaganda technique is calling whataboutism when confronted with the fact that you're being a hypocrite. It's a well known technique used to deflect any criticism of the US regime.

The fallacy of screeching whataboutism is in the use of a double standard for oneself and ones adversaries. If you screech that CGTN has bias, while similar level of bias exists in western media then what exactly is the point you're making.

In fact, simply screeching that CGTN has bias without addressing the content of the article is a form of ad hominem fallacy. You are dismissing the content of the article by attacking the source and claiming that it's biased. You didn't actually engage with the topic at all or show what this supposed bias is in relation to the topic. All your comment attempts to do is to shut down discussion because by attacking the source.