The Shanghai Metro is a rapid transit system serving the city of Shanghai, China. It is one of the largest and busiest metro systems in the world, with over 700 kilometers of track and more than 400 stations. The system began operation in 1993 and has expanded rapidly to accommodate the city's growing population. The Shanghai Metro operates 18 lines, including both underground and elevated sections. It provides an efficient and affordable means of transportation for millions of passengers daily, connecting key areas such as the Pudong financial district and Shanghai Disneyland. The metro is known for its cleanliness, safety, and punctuality.