AFOREMENTIONED APARTMENT PROPERTY CONTAINS THE PROPERTY OF THE SECTIONED LAND OF THE LAND, ON WHICH THE APARTMENT PROPERTY IS BUILT, THE BUYER OF AFOREMENTIONED APARTMENT IS REQUIRED TO SELL BACK THE PROPERTY OF THE SECTIONED LAND TO THE ORIGINAL SELLER OR TO WHOM SUCCESSED OR ENTRUSTED THE RIGHT TO BUY BACK THE SELLER'S AFOREMENTIONED SECTIONED LAND UPON THE BUYER RELINQUISHES AFOREMENTIONED APARTMENT PROPERTY