Hong Kong’s Development Bureau will test whether heavy-duty drones, weighing nearly 150kg (330.6lbs) each, can carry essential items across up to six sites over the next 12 months, the South China Morning Post has learned. In response to queries from the SCMP, the bureau revealed it was partnering with two companies to test whether the devices could carry heavy materials such as cement and manhole covers for construction work. Other potential applications include clearing drains and cleaning...