This photo taken on June 23, 2024 shows a mini-library at a station of Metro Line 6 in Suzhou City. Connecting many of Suzhou’s landmarks, Metro Line 6 is offering a 3-day free ride from June 23 to 25. (CFP Photo)

This photo taken on June 23, 2024 shows a mini-library at a station of Metro Line 6 in Suzhou City. Connecting many of Suzhou’s landmarks, Metro Line 6 is offering a 3-day free ride from June 23 to 25. (CFP Photo)

This photo taken on June 23, 2024 shows a mini-library at a station of Metro Line 6 in Suzhou City. Connecting many of Suzhou’s landmarks, Metro Line 6 is offering a 3-day free ride from June 23 to 25. (CFP Photo)

This photo taken on June 23, 2024 shows a mini-library at a station of Metro Line 6 in Suzhou City. Connecting many of Suzhou’s landmarks, Metro Line 6 is offering a 3-day free ride from June 23 to 25. (CFP Photo)

This photo taken on June 23, 2024 shows a mini-library at a station of Metro Line 6 in Suzhou City. Connecting many of Suzhou’s landmarks, Metro Line 6 is offering a 3-day free ride from June 23 to 25. (CFP Photo)

This photo taken on June 23, 2024 shows a mini-library at a station of Metro Line 6 in Suzhou City. Connecting many of Suzhou’s landmarks, Metro Line 6 is offering a 3-day free ride from June 23 to 25. (CFP Photo)