China subsidized EVs in the same way that America did (tax credits), and less aggressively so. Unless you mean incentives from Shenzhen and getting taxi companies to early adopt? They also added incentives in getting a car at all in cities like Beijing (EVs started out in a different lottery allocation for plates)?

It's more like BYD winning the race in China's auto industry. China has over a hundred automakers, most making low-end cars.[1] Some are state-owned, some are province-owned, some are privately owned. BYD is privately owned and doing well.

[1] https://en.wikipedia.org/wiki/List_of_automobile_manufacture...