Administrative expropriation refers to an administrative legal system in which administrative organs compulsorily obtain the right to use or own the property of citizens and legal persons in accordance with the law for public interests and public purposes, and provide them with reasonable compensation.
According to the above definition, which of the following is not an administrative expropriation?
An economic development park built by the town two years ago used Yang Jun's contracted land, and Yang Jun received reasonable compensation through repeated efforts