Zhengzhou Greenland Twin Towers for sale. As a landmark building in Zhengzhou City, Greenland Center Gemini has a peak unit price of 40,000 yuan. According to relevant information inquiries, the Greenland Twin Towers were built in 2008 by Beijing Eastern Greentown Real Estate Co., Ltd., with a total of 2 buildings and a total of 2,234 houses. The property management company of the community is Greentown Property, with property fees ranging from 11.5 to 19.2 yuan/square meter/month.