Lilac Light Rail Route 721/722 (Chinese: 麗蓮輕鐵721/ 722綫) are 2 circular routes jointly owned by Qingli Railways and Lilypad Rail, set up in Tempest area. Routes 721 and 722 are actually the same route, but in different directions. Route 717 is in clockwise direction; while Route 718 is in anti-clockwise direction.

Lilac Light Rail Route 721/722 麗蓮輕鐵721/ 722綫
Overview
Operate location	Tempest
Transit type	Light Rail Transit
System	Lilac Light Rail
Status	Operational
Terminus	Tao Tung
Technical
Character	Overground At-grade Underground
Maximum speed	60km/h
Number of stations	18
Track gauge	1435mm (4 ft 0.5 in) standard gauge
Electrification	750V DC Overhead wire cable
Depot	Daimon North Depot
Rolling stock	Light Rail Phase I Light Rail Phase II Light Rail Phase III
Number of cars	1 or 2
Service
Opened	9 July 2023
Owner(s)	Qingli Railways Lilypad Rail
Operator(s)	Lilypad Rail

On 9 April 2023, apart from routes 717 and 718, Lilypad Rail proposed another 2 circular routes which has a smaller circle than the former routes, namely the “Tempest South Circular”. The smaller circle is included in the Southwest of the big circle, taking up about one quarter of the area of it.

On 9 July 2023, routes 721 and 722 were completed together with the whole Tempest light rail network