Being open and willing to accept foreign media (even when it's of low quality or propagandistic) is an advantage of genuinely open societies.
Bad speech can be countered with more speech, and media from western countries can easily be seen on VPNs in countries with heavy censorship. Bans only play to more repressive societies who can claim equivalence.
A better approach is to monitor the activity and narratives promoted and counter them. Chinese propaganda is usually ham handed and low quality anyway.