The worry is that internal conflict will lead to external wars as a distraction of the populace.
Yes, which is why I brought up the disparity in the number of the genders in the population. It's that disparity which makes cultures unstable and violent.
Is Chinese power about to peak? : https://www.economist.com/leaders/2023/05/11/is-chinese-powe...
How soon and at what height will China’s economy peak? : https://www.economist.com/briefing/2023/05/11/how-soon-and-a...
How China measures national power : https://www.economist.com/briefing/2023/05/11/how-china-meas...
The fall of empires preys on Xi Jinping’s mind : https://www.economist.com/briefing/2023/05/11/the-fall-of-em...
In short, they do have a number of functional problems keeping them from further growth. Chief among them is a lack of local resources. They must rely on importing base materials in order to have value added goods to export. Plus some indications that just because their government wants to grow their people may not have such a strong desire. They have something like 34 million more males than females. Also growing signs of toxic financial conditions in their real estate markets including fraud and abuse ("How to escape China's property crisis" https://www.economist.com/finance-and-economics/2023/06/28/h... and "China’s economic recovery is spluttering. The prognosis is not good" https://www.economist.com/leaders/2023/06/22/chinas-economic... , etc)