The Most Congested Line: Line 3 at the North Gate is perpetually swamped; it's so packed that finding a foothold is a challenge. This is largely due to the influx of commuters from Qingbaijiang and Deyang.

Distinctive Station Announcements: A unique touch lies in the station announcements. Male voices herald transfer stations, while female voices announce non-transfer ones, adding a touch of personality to the journey.

The Colossal Station: Western China International Expo City Station stands out with its myriad escalators and sprawling area, reminiscent of an airport terminal in its grandeur.

A Super TOD Marvel: Luomashi Station isn't just a four-line transfer hub; it's an engineering feat. Line 10 here plunges to a depth of about 35 meters, while Line 18's deepest point reaches a staggering 45.5 meters, equivalent to 15 stories underground—truly a crown jewel among stations.

The Lengthiest Line: Line 19 stretches over 100 kilometers, hurtling at 160 kilometers per hour. It races alongside aircraft, connecting two airports daily, a testament to Chengdu's modernity.

The Line with the Most Stations: Line 6, with 56 stations crammed into seven administrative districts, is a marathon of a line. Its entire 60-plus-kilometer stretch is underground, a testament to urban planning prowess.

The Most Intricate Station: Chengdu University of TCM Provincial Hospital Station, where three metro lines converge, is a labyrinthine challenge. Even with maps in hand, many rely on navigation to navigate this complex intersection.

Driverless Trains: Lines 9 and 27, soon to be joined by Line 30, are pioneers in automation. They're not only the highest-numbered lines in the nation but also the first to adopt "regular fully automatic + train-to-train communication" technology, a leap forward in metro technology.

The Most 8A-Type Trains: By 2025, Chengdu Metro will be home to at least six lines utilizing 8A-type trains, the most extensive deployment in the country, a nod to its commitment to modernization.

The Longest Gestation Period: From inception to operation, Chengdu Metro's journey spanned 25 years, a testament to the city's unique geological challenges and the meticulous planning required to overcome them.