Prior to World War II, Shanghai, like Saigon, was a major trading port, controlled by foreign powers. Following communist victory in 1949, most international firms relocated to Hong Kong to protect their assets.
With China's move toward globalization in the early 90s, Shanghai returned to its former glory, reaping vast economic benefits.
The .gif below shows the changes to Shanghai's skyline over the past 26 years (1987 - 2013) when the city's population went from 11 million to more than 23 million.
Perhaps we'll be looking at a similar change to Saigon's skyline over the 26 years.
Looking at you, Thu Thiem...