Taxes and pensions are pressing, immediate problems within the next 50 years. What you're talking about is a much bigger problem trend, but it will take longer to occur, say 80-120 years.
Age pyramid? That's not the biggest issue in China's demographics: it's the sex ratio. Talking vague FUD about China isn't helpful and doesn't contribute to this discussion.
Mass migrations and food shortages are happening now, but not as bad as they will be. This is due to both climate and US Monroe doctrine meddling (crime caused by the War on Drugs and installation of right-wing leaders with death squads).
Age pyramid? That's not the biggest issue in China's demographics: it's the sex ratio. Talking vague FUD about China isn't helpful and doesn't contribute to this discussion.
Mass migrations and food shortages are happening now, but not as bad as they will be. This is due to both climate and US Monroe doctrine meddling (crime caused by the War on Drugs and installation of right-wing leaders with death squads).