Set up a giant park in a big city like Ho Chi Minh, Hanoi
Supercities like Hanoi and Ho Chi Minh have a large population of over 10 million people, high construction density, but not many parks. Large cities can invest in forming giant parks, which are urban lungs. Check out New York City's Central Park
Central Park is a public park in central Manhattan in New York City, United States. The park originally opened in 1857, on 843 acres (3.41 km2) of city-owned land. In a design competition held in 1858 to renovate and expand the park, Frederick Law Olmsted and Calvert Vaux won with the Greensward Plan. In the same year, construction began according to the new design, continued throughout the Civil War, and was completed in 1873.
A huge park is the green area of the city, which is also home to an air-conditioned reservoir for the whole area. In case of relocation of Tan Son Nhat airport, this area can develop a giant park to create urban green space and regulate against flooding.

and surrounded by high end estates
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Before real estate development, the City will build large parks as the highlight, high-value real estate will form around the park.




