China was the first country to reach a population of 1 billion people, achieving this milestone in 1982. Rapid population growth in the 20th century, driven by improvements in healthcare, agriculture, and overall living conditions, contributed to this historic figure. By implementing birth control policies in the late 20th century, China has since managed its population growth. Today, the country faces various demographic challenges, including an aging population and gender imbalances, which have prompted discussions about modifying population control policies. China's journey to 1 billion remains a significant marker in global population history.