Population in China is projected to exceed 1.5 billion by the mid-2030s. This estimate is based on different methods like urbanization and fertility rates. The working-age population is expected to reach over 770 million by 2000 and exceed 890 million by 2020. The number of elderly people over 65 years old will make up 20% of the total population, while those over 60 will be 25%. This growth will put pressure on society due to higher dependency ratios.