Censorship in China, with BuzzFeed's Megha Rajagopalan

After working in China for six years on many stories unfavorable to the Chinese government, in 2018 journalist Megha Rajagopalan's visa was not renewed, forcing her to leave China abruptly. Why? She's still not sure and says that the government uses ambiguity very deliberately, causing Chinese and foreigners alike to self-censor, as they don't know where the lines are. How does this affect the flow of information and Chinese society as a whole?