Who bought the land at the United Nations? Why?

After the end of World War II, the victors decided to set up an organization dealing with world affairs-the United Nations in new york, USA. However, in any prosperous city, it takes a lot of money to buy land and build huge buildings, and every penny of the newly-built United Nations Headquarters bears a heavy responsibility. There is nothing the United Nations can do about it. When the Rockefeller family heard about it, they immediately invested $8.7 million to buy a piece of land in new york and donated it unconditionally to the United Nations. Isn't it surprising that the Rockefeller family is a little dizzy? How did the Rockefeller family move a few tricks? When they bought the land donated to the United Nations, they also bought all the adjacent land. When the United Nations building was completed, the surrounding land prices soared immediately. Now, no one can calculate how much $8.7 million the Rockefeller family got by virtue of the land adjacent to the United Nations. Only those who have been holding back their jokes have seen the eyes of their families.