In case you were wondering what 3 million buildable square feet is:
The empire state building has floor space of 2.77M square feet, so the Shenzhen land is zoned for approximately 1 empire state building. The base of the empire state building is about 2 acres, and then of course it has sidewalks and other areas surounding it taking up somewhat more area. The Shenzhen land is around a dozen acres.
The chrysler building has floor space of 1.2M square feet, so they could instead build 2 and a half chrysler buildings.
So, it's zoned to contain one fairly large skyscraper, or more likely a small number of medium size skyscrapers. Of course more importantly, it's zoned that way in a special economic zone with 15% (as opposed to 25%) tax rate, 6 miles from the airport, on a highway, and near Hong Kong.
Is Nam Tai Shenzen not locate in BaoAn district? If so then it locate in district which next to Qianhai economic zone. Does only business locate inside special economic zone have tax advantage or those in neighbor district get advantage to?