Redefining urban squalor...
Looking at the pictures now, it seems quite dirty and oppressive, but while I was living in Hong Kong in the 1970's, it did not feel all that bad. Some of my most prominent memories of HK was buying snacks from the quasi-legal street vendors. I vividly recall "purchasing" a stick of fish balls from a vendor and before I could pay him, he took off running with his cart because he saw policemen coming.
Would have loved to roam those corridors. Reminds me of J.G. Ballard's The Concentration City. I'm especially intrigued by the image of the Tin Hau Temple, surrounded by buildings with light just breaking through the grate above. Imagine all of the other interstitial spaces in that web of buildings.