What most people won't say or don't even see:
The "Belt and Road Initiative" and other initiatives by China can propel them to a never before seen globally powerful economic position.
As I see it: they're stretching cross their borders with new infrastructure connecting them with the rest of the world, especially with Europe and Africa.
China has set foot in Africa, they're grabbing Europe with maritime/railway and road connections.
Not only they will become the most powerful economy in the world, but they're founding new links that connect them with Germany, core-Europe (see Central Europe: Hungary, Poland, Czech Republic, Austria), Russia.
Not only to sell their export products, but also to:
- develop and control infrastructure and powerfully influence entire regions (and implant themselves militarily to places like: Eritrea, Pakistan and dominate the entrance to the Red Sea, set foot militarily in the Indian Ocean etc.)
- attract new allies (economically and politically): blackmail will probably start in a later phase
- "help" the enthusiastic new partners (like the various African countries) with credits (which will have to be paid back in the end)
- to develop global presence (economical, political, military) by stretching out of the relative isolation (China being the most isolated great power: geographically, political - just check the map and see how they're surrounded by deserts, the Himalayas and potential "enemies")
- etc.
China could consolidate a tremendously strong position (while the US' power is slowly decaying). Obviously, not everyone is happy about in the world.