Add Your News LeaveHomeSafe app to allow users to upload their whereabouts to Hong Kong health code Hong Kong authorities will update the LeaveHomeSafe app, allowing users to upload their visited locations to a “Hong Kong health code” if they want to travel to the mainland, an IT expert said. Mainland China has long enforced a health code system. Users are given three color codes based on the risks of them getting Covid-19, and only those with a green code can roam freely. On Thursday, authorities will announce major updates to the Hong Kong health code, which people have to…