Sightseeing Express (Chinese: 观光快速/觀光快速) is a through operation system operated by CyanEX Rapid Transit.

Sightseeing Express 观光快速
Overview
Transit type	Mass Transit
Status	Operational
Terminus	Ostania Al-Tighnari Hana-Koshi Beach (WIP)
Technical
Character	Overground At-grade Underground
Maximum speed	120km/h
Number of stations	22
Track gauge	1435mm Standard Gauge
Electrification	Magic (Current) 1,500V DC OHL (Planned)
Depot	Al-Tighnari Depot
Rolling stock	CXD104
Number of cars	4
Service
Opened	18th June 2022
Operator(s)	CyanEX Rapid Transit

Sightseeing Express provides through running service in the following lines:

• Sumeru Line (CyanEX), from Al-Tighnari to Niloufar
• Sightseeing Express Line (CyanEX), from West Shore to CyanEX Sakura Stream
• Azalea-Cyan Line (Azalea Railway), from CyanEX Sakura Stream to Cyan Heights
• Cyan Twilight Line (CyanEX), from Cyan Heights to Twilight Spruce
• Bond Line (QLR), from Twilight Spruce to Ostonia

Services are operated by a fleet of CXD104 trains, with the first 20 sets fitted with Alstom OptONIX 1500 VVVF inverters and subsequent trains fitted with CRRCTEC tPower-TN3 VVVF inverters. A new fleet of CXD105 trains with LCD passenger information system installed are currently in production.

Sightseeing Express originally opened as an alternative route of the original Sightseeing Line (now Sightseeing Local Line), to reduce the travel time from Cyan Heights to Scarlet Devil Mansion. It then received several extensions, firstly from Scarlet Devil Mansion to West Shore, then the through operation with Sumeru Line, and finally from Cyan Heights to Twilight Spruce and the through operation with Bond Line.

This service used to take the name of Sightseeing Express Line, but was subsequently renamed to Sightseeing Express to better align with its status of a through running system.