China's top legislature has formally adopted a resolution easing the country's one-child policy.

As BBC News reported, citing Xinhua, The Standing Committee of the National People's Congress passed a resolution allowing couples to have two children if either parent is an only child.

A proposal to abolish re-education through labour camps was also approved.

The changes in policy were announced following a meeting of top Communist Party officials in November.

The reforms, which came at the end of a six-day meeting of the congress, have already been tested in parts of the country. They needed formal legislative approval to be put into effect.

China introduced its one-child policy at the end of the 1970s to curb rapid population growth.

But the policy has become increasingly unpopular and leaders fear the country's ageing population will both reduce the labour pool and exacerbate elderly care issues.

By 2050, more than a quarter of the population will be over 65.