There are matters we need to sort out quickly arising from the Tai Po fire tragedy but also systemic issues that need to be tackled if we are to avoid a repeat of the disaster. The fact is that Hong Kong faces two sorts of ageing problems: old buildings and the old people who live in them. Sometimes they overlap. Hong Kong is inevitably a high-rise city, because so many people are crammed into a relatively limited land area. If you can’t build out, you build up. Since we have been developing...