"Go Hong Kong" is an official mobile application launched by the Immigration Department of the Hong Kong Special Administrative Region. It targets eligible frequent visitors to Hong Kong for pre-registration of e-Channels. Visitors aged 18 or above with valid electronic travel documents, who have entered Hong Kong at least twice via Hong Kong International Airport within the past 24 months and hold clean immigration records, may submit applications before arrival. Users can verify identity by reading the chip of their travel documents and completing facial recognition, and fill in the estimated arrival date. Once approved, they can use e-Channels for self-service clearance. The app also supports updating, reinstating or canceling e-Channel registrations. Approval notifications will be sent via the app and email, and each registration is valid for 3 months. It streamlines on-site procedures and cuts waiting time for regular visitors. For details on enrolment for the e-Channel service, please visit the ImmD website (www.immd.gov.hk).