Hong Kong’s subdivided flats and cage homes are stark reminders of the decades-long housing crisis in the city. These flats, often smaller than an average parking space, are usually carved out of larger apartments and represent one of the bottom rungs of the city’s housing ladder. Today, more than 200,000 people have been stuck living in these claustrophobic spaces as Hong Kong’s housing supply falls well short of recommended targets. Mainland China’s top official for Hong Kong, Xia Baolong,…