Easy to spread but easy to ignore. The internet cheapened communications to the point where propaganda has about the same worth as cat memes.
You can only ignore the propaganda if you recognize it as such. Western audiences don't really have the background knowledge to evaluate what they read, and Western media tend to focus on the foreign policy of their country as it relates to China.
The two highest-quality (in terms of professionalism and level of detail) English news sources reporting on China are https://scmp.com and http://sixthtone.com . The South China Morning Post has somewhat retained their independence, but Sixth Tone is a government-backed propaganda outlet, existing only to counter negative reporting on Chinese politics with news in other domains. Someone reading a lifestyle article on Sixth Tone isn't easily going to realize that they're reading propaganda unless it's pointed out to them.
It's so easy to spread ideas using Internet these days, that almost all business, political and social entities around the world are involved in the spreading whatever ideas they deem worthy.
The bigger entities are able to spread them more effectively which is expected.
Internet may eventually turn out to be a bigger monster for modern human civilization than other threats in the past like World Wars and Cold War.