The growth numbers tell me that the existence of the policy may have been exaggerated.
Maybe it's applied selectively depending on political leanings.
The Chinese government has recognized the harm that the 1 child policy (which has loopholes, incidentally - You can have more than one child, you just have to pay the penalty cost for the additional licenses) has done to their demographics. They are openly talking about ways to avoid the demographic collapse that Japan is in.
I suspect they will continue encouraging Chinese citizens to live overseas - to reduce the population pressures in the mainland for the near term future. Most Chinese people that I’ve spoken with view this as a temporary situation, though, and are fully prepared to return home once the country is in a “more stable situation.”
The one child policy was mostly applied to the Han Chinese. Other ethnic groups were exempted from the policy and there were many exceptions to the policy as well, such as a daughter being the first child then a second child would be permitted.
If my memory serve me right (and it may not) I think the one-child policy has expired and now they have a two-child policy.