This might be stretching the definition of "regime change" and "country" `*`, but China has clearly engaged in coercive methods to install *just exactly the government it wants* in Hong Kong and this has been getting more pronounced over time.

Dissent is not tolerated and candidates for the "elections" need to be Beijing-approved.

While it is tempting to look at the US's, and Russia's, activities in this domain, China has been very far from benign, as other answers have also detailed.

`*` the original promise was "one country/two systems".  The second part certainly has not been delivered on.