File photo taken on Oct. 22, 2010 shows an old lady doing exercises at a rehabilitation center in Shizuishan, northwest China's Ningxia Hui Autonomous Region. [Photo/Xinhua]
The number of Chinese senior citizens is expected to reach 430 million in 2050, 30 percent of the total population, and over 20% of Chinese senior citizens rely on their pensions, the Beijing Times reports.