State when a couple can marry according to the china's one child policy and discuss it's consequences

According to China's one child policy, a couple can only marry after receiving a birth permit from the government, which typically allows them to have one child. This policy was put in place in the late 1970s in an effort to control the country's population growth.

The consequences of this policy have been significant. One of the main issues is the gender imbalance that has resulted from the preference for male children. Many families have resorted to sex-selective abortions or even infanticide in order to have a son. This has led to a skewed gender ratio, with more boys than girls in the population.

Additionally, the one child policy has had a negative impact on the economy, as the aging population has put a strain on the country's healthcare and social security systems. There is also concern about a shrinking workforce, as fewer young people are available to support the growing number of elderly citizens.

Overall, the one child policy has had far-reaching consequences on Chinese society, and it has been criticized for its strict and sometimes draconian measures. In recent years, the government has relaxed the policy, allowing couples to have two children in certain circumstances, but the effects of this decades-long policy are still being felt.