Which country has the world's largest rail network?

China has the world's largest rail network, which spans over 146,000 kilometers (90,000 miles) and carries more passengers and freight than any other country. The country has made significant investments in expanding its rail infrastructure in recent years, with a focus on high-speed rail and modernization of existing lines. The rapid expansion of China's rail network has been instrumental in boosting the country's economy and improving transportation access for its citizens.

China's railway system includes a mix of standard and high-speed rail, with speeds reaching up to 350 km/h (217 mph) on some routes. The network is operated by China State Railway Group, which manages both passenger and freight services. In addition to domestic routes, China has also been involved in the construction of rail projects in other countries, including Africa, Southeast Asia, and Europe.

Other countries with extensive rail networks include the United States, Russia, India, and Canada. While these networks are not as large as China's, they still play a critical role in transportation and logistics in their respective countries.