What slice of the economy? The 3rd world country with an unstable political system with coups or other shenanigans happening every 5-10 years. Let them have it and then fund rebels some millions of dollars to destroy it. What do you think the US does now, it waits for China to moronically invest dozens of billions into a shithole country and then the CIA comes, does its thing and poof the investments are in danger of disappearing.
IMO the best solution is to require that the countries receiving such significant investment should move their foreign holdings to Chinese owned banks. Why do you think that nobody fucks around with the US?
Its because everyone have their own wealth invested into the US, so the moment troubles start the US can just collect the collateral money already stored in US banks
There is an argument to be made to force countries into closer relationship with China, but current government policy is to let countries handle their own internal politics.
From the experience of the Cold War, USA was able to isolate countries expressly friendly with USSR. Although outside of Europe, USSR did not really try to control internal politics of USSR-friendly countries, USA and their allies were able to isolate these countries anyway by pointing out the existence of a counter bloc (Warsaw Pact). Even the "democracy" of India was sanctioned in this way (far beyond the repercussions of picking on Portugal).
China is trying to engage with countries on independent terms, this way they can seek ties with both USA and China without express harm. You can see the fruits of this throughout SEA, Thailand, Malaysia, Indonesia and now Philippines.
Now, there will be losses sometimes, but you cannot win every single investment.
It's incredibly interesting how the American narrative was able to seize the narrative behind the coup. I think this is an influence operation that puts what they did in HK to shame.
VOA trying to highlight Arakan Army resistance against Tatmadaw in 2019 as part of the Suu Kyi abandonment campaign.
Look at their rifle, it's Type-81 (you can tell from the sight post over the gas tube rather than over the barrel end). This is probably supplied by Bangladesh as BD-08, but certainly with knowledge from China. Yet America is trying to take credit for it.
If you look up other rebel armies (Wa State army, Kokang [ethnic Chinese] army), many of them are equipped with rarely exported weapons such as Type-97 and Type-03, which means there is complete certainty in the source. If China really supported the Burmese military, they would simply disarm these rebels and not tie them up. So we can see that the American counter narrative is so effective that it has basically usurped reality.