求教有关C++中子对象析构的问题

在VS2010上，代码如下：

#include<iostream>
#include<string>
 using namespace std;

class Person
{
public:
    Person(int age ,char* name );

    void get() const;
    
   ~Person()
    {
        cout<< "Destructor in the fun of Person! "<<endl;
    }
      

private:
    int Age;
    std::string Name;
};
 Person::Person(int age,char* name)
 {
     Age = age;
     Name =name;
     cout<<"\nConstructor in the fun of Person!"<<endl;
     
 }
 void Person::get() const
 {
     cout<<" Age:"<<Age<<"\tName:"<<Name;
 }

class Wangmin: public Person
{
private:
    std::string University;
    std::string Address;
    char* NO;
    std::string Interest;
    int age;
    char* name;
public:
    Wangmin(char* Uni,std::string Add,char* No,char* Intr,int Age,char* Name ):University(Uni),Address(Add),NO(No),Interest(Intr),Person(Age,Name)
    { 
          cout<<"\nConstructor in the fun of Wangmin"<<endl;
    }
    void get(Wangmin& student) const
    {
        cout<<"University:"<< student.University<<"\t Address:"<<student.Address<< endl;
        cout<<"NO:"<<student.NO<<"\tInterest:"<<student.Interest<<endl;
    }
      
     ~Wangmin()
    {
        cout<< "Destructor in the constructor fun of Wang_min"<<endl;
    }

};



int main()
{
    
    
    Person Liu_Bei = Person(52,"liubei");
    
    Liu_Bei.get();
    
    Wangmin Wang_Min = Wangmin("TJPU","Hunan_Hengyang","201021010626","Telecomunication",25,"Wang_Min");

    Wang_Min.get(Wang_Min);
    
}

在VS2010上运行的结果，请问为什么“Wang_Min”这个对象要析构两次？