Without a doubt China is set to become the dominant world power.
They value education, science and technology.
They are for the most part a homogeneous people with a low tolerance to outsiders.
They are lead by a technocratic dictatorship, which means they can get shit done fast.
Geopolitically they are well positioned to engage in cold war competition at far higher cost efficiency than their rivals.
All China has to do is wait for the West to slowly become 3rd world shitholes. This may well take another hundred years or more, but the Chinese are extremely patient people. Their closest rivals will then be India and Russia, a laughable comparison. At this point Chinese hegemony will be total. Then they will slowly move in and take over whatever parts of the world pleases them. Probably without even a shot being fired. Just by moving their people in and displacing the local inhabitants. All quite peacefully. Just like they did to Singapore, like they are doing to Tibet, as they are doing to the Xinjiang, as they are on verge of doing in East Africa.
Within a thousand years or less the predominant world population will be mostly derived from Han Chinese. Surviving ethnic enclaves other than Han will be about as relevant, culturally, politically and economically, as the native American Indians.
Now here is the kicker. At long last the likes of Greta Thunburg will get their wishes fulfilled. Even though her DNA will likely be extinct, or swimming around as an archaic reminder in the blood of some predominately Han Chinese descendant. The Chinese, providing they dont actually mange to kill all life on this planet in the process, will slowly awaken to the need to preserve what ecosystems remain in a sustainable manner. After all, their politburo will need clean air to breathe. If they deem it necessary it will be done, soon and fast, with an iron fist, with none of the Western fuckarsing around doing nothing which has prevailed for the past 100 years.