To investigate how urban express lines can achieve "rapid arrival" and enhance their service level and public transit attractiveness, this paper uses Chengdu Rail Transit Line 19 as a case study to examine key technologies in transportation organization oriented toward rapid arrival. Under Chengdu's dual-airport configuration of "one city, two airports," the Chengdu Rail Transit Line 19, which achieves "30-minute rapid connectivity between dual airports," represents an exemplary case of rapid arrival for urban express lines. Facing a 66.7 km operating distance between the two airports and a composite functional positioning, Chengdu Rail Transit Line 19 innovatively adopts the following key train operation technologies to achieve rapid inter-airport connectivity: Completing the design of a "one-line separation and three-line through operation" scheme among Lines 17, 18, and 19 to ensure the feasibility of direct train service between the two airports; increasing the maximum operating speed of the urban AC A-type trains from 140 km/h to 160 km/h, thereby creating better conditions for 30-minute direct connectivity between the dual airports; maintaining high-speed operation of direct trains by increasing their passing speed through stations to 160 km/h and introducing No. 42 turnouts. Through a systematic review of these innovative technologies, this paper identifies five key design insights for achieving rapid arrival in urban express line transportation organization: Advance planning to ensure cross-line operation capabilities; unified scheduling of cross-line operating lines; new approaches to speed enhancement for urban A-type vehicles; favorable conditions for increasing express train passing speeds; and cautious introduction of No. 42 turnouts into underground projects.