All the tech companies in China are practically under the control of the party. China also has a billion+ people, even the market is smaller than the west, I think they will manage.
Not to mention the difference in privacy laws and a higher number of stem grads to throw at the problem.
Combine the public western data and private chinese data, and it should be enough for them to give the west a run for its money if they decide to slow/stop. Not to mention that chinese apps like tiktok are used very widely in the west, and coorps like Tencent have a tentacle wrapped around hundreds of western coorps.