Hong Kong homeowners could adopt technology-led preventive maintenance of older buildings to avoid costly large-scale renovation, with the upmarket Residence Bel-Air serving as a viable example that saved residents more than HK$1 billion (US$127.5 million). Allen Ha Wing-on, convenor of the Residence Bel-Air owners’ committee, said while the Wang Fuk Court tragedy was a wake-up call to transform the city’s decades-old practice of conducting major renovation works for ageing estates, the private...