Growth in the working population had now stagnated, the report said, and the rising number of elderly people will have a far-reaching impact on the social and economic development in the country, especially if fertility rates remain low. "From a theoretical point of view, the long-term population decline, especially when it is accompanied by a continuously ageing population, is bound to cause very unfavourable social and economic consequences," it said.
China's population is expected to fall back to 1.36 billion by the middle of the century, it said, which could mean a decline in the workforce of as much as 200 million. If fertility rates remain unchanged, the population could fall to 1.17 billion by 2065, it said. China decided in 2016 to relax a controversial "one-child policy" aimed at curbing population growth and allow all couples to have two children. However, the country's birth rate still fell 3.5 percent in 2017 and is expected to have fallen again last year.