They made solar, wind, and batteries affordable. That is what is going to ensure the transition happens

And now President Xi has said China will strive to do better than the targets in your new national climate plan – or your NDC [Nationally Determined Contribution].

To put that in context: China has set its own NDC (deliberatly?) low. As the scientists at the Climate Action Tracker (CAT) say

Historically, China has calibrated its climate commitments to levels that are largely achievable under existing policies and investment trends, allowing room for over-delivery.

Referring to China’s 2035 NDC targets, the analysis adds,

... despite structural improvement, this target is unlikely to further lower emissions ... There is a substantial gap between the NDC targets and the reductions needed to align with 1.5°C ...

As the CAT researchers conclude and you can see on their site, China is among the countries most behind when it comes to reach the Paris agreement.

But it's a good speech by the diplomat at the Chinese university and it fits OP's ongoing propaganda move.