what can you tell me about their architecture?
The lack of available space restricted development to high-density residential tenements and commercial complexes packed closely together on buildable land.
Hong Kong
 The lack of available space restricted development to high-density residential tenements and commercial complexes packed closely together on buildable land. Single-family detached homes are extremely rare and generally only found in outlying areas.

where does the name hong kong come from The name of the territory, first romanised as "He-Ong-Kong" in 1780, originally referred to a small inlet located between Aberdeen Island and the southern coast of Hong Kong Island where is this place located? The eastern Pearl River Delta of the South China Sea.
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Hong Kong [SEP] Architecture
The Tin Hau Temple, dedicated to the sea goddess Mazu (originally built in 1012 and rebuilt in 1266), is the territory's oldest existing structure. The Ping Shan Heritage Trail has architectural examples of several imperial Chinese dynasties, including the Tsui Sing Lau Pagoda (Hong Kong's only remaining pagoda).