These tactics aren’t new. Many Chinese children of my generation read a newspaper column for students called “Socialism Is Good. Capitalism Is Bad.” Each week, it described the wonders of China alongside the hardships of capitalist societies. The lesson: Socialist China takes care of its people, while people in the United States go hungry and the elderly die alone.

Even if the stories were true, they didn’t represent the full picture. Chinese children like me pitied Americans even when almost all of China lived in poverty. How much would we have envied them if we had known that most could eat meat whenever they liked?

Such campaigns became much easier to sell when China’s economy took off, and we could see the country’s progress for ourselves.

Now that mission is getting tougher. Even before the pandemic, China’s economy wasn’t growing the way it once had, and the government has been intruding more and more into everyday life. China’s propaganda machine has ramped up the volume to deliver its message, encompassing all of Chinese official media and the country’s social media platforms.

If that newspaper column existed today, it would be called “China Is Great. Whoever Says Otherwise Is Our Enemy.” And it would be impossible to avoid.

The website of Global Times, a tabloid controlled by the Communist Party, added Chinese subtitles to a video from Mr. Noah’s show that featured President Trump and many Fox News personalities, showing how for weeks they played down the risks of the coronavirus.