There population will drop by almost half by 2050 as the old Chinese die-off has already begun. The Chinese internal market is not mature enough to support China's manufacturing based economy. So China needs a major re-structuring, and that may not be possible if the global trading system continues to degrade or if China gets hit with trading sanctions from the West.
Because of China's 1 child policy, and that their culture valued boys more than girls, China's current gender ratio of 15-19 year olds is 118 boys for every 100 girls.
Send those excess boys to die fighting the U.S. over Taiwan, and the balance will be restored.