Officials don't seem to publish ultra-nationalist and xenophobic content directly, as they are still nominally communist (though in reality authoritarian capitalism, like Taiwan and South Korea before democratization). But they are deliberately indulging such comments to bolster their support among the people, which are often anti-Western. Some private, government-sponsored media are more deliberately drawn to xenophobia, such as portraying the United States as evil, pro-Western economic failures as stupid, and allies such as Russia as friendly and righteous. But they don't use any racist words to avoid criticism, but by deliberately choosing news that they only want you to see. For example, Russia and Ukraine are two countries with the same economic failure, but when reporting on Russia, they tend to prefer positive news such as victory, while when reporting on Ukraine, they tend to choose negative news such as poverty and serious corruption.

Sorry I didn't seem to see your question clearly. The CCP's influence on young people's minds is long-term and subtle, but also very effective. There are many young Chinese now questioning the benefits of democracy and free speech, and even supporting the establishment of a firewall for censorship. I don't think it can be done without political propaganda and censorship.

Unlike North Korea and Cuba, China is a country with a comparatively developed economy and ubiquitous Internet. Many people understand how to use proxy tools to break through online censorship. But they still choose to support the government to squeeze the space for free speech. This is special because their view of the world has been shaped, exposure to western internet will not change their perceptions. And the reason why a government like North Korea can continue to exist is more because most people are cut off from outside information. I don't think the North Korean government wants the economy to develop, because it will lead to its collapse.