That is quite a bold claim. What are the sources or inferences you draw on for this belief?
They have too many old people and not enough young people.
It’s potentially possible that automation can solve this problem but China’s economy has relied on relatively cheap labour for growth and the shift from will be rather alarmingly sudden.
1. China has demographic imbalances
2. ???
3. "It is sad that so many lives will be lost in the famine that results."
That being said, they can avoid a production collapse by increasing productivity. China is building all kind of infrastructure like crazy. They need to move to first-world status, however, in the next 10 years or so. It’s going to be interesting to watch.