Why is the value of value changed to 5？

Question

I don't know what went wrong.This problem has been bothering me for nearly 2 days.Is there a god who can help me?
When running the test "health" "set_health" "this.health" value becomes "5"

public class stats : Node
{            
    [Export]  private int Max_Health=8;
    public int health;
    public int set_health
    {   
        get { return health; }
        set
        {
            this.health=value;
            GD.Print(set_health);
            GD.Print(health);
            GD.Print(this.health);
            if (set_health<=0)
            {
            EmitSignal(nameof(nohealth));                       
            }   
        }    
    }
        public override void _Ready()
    {
        health=Max_Health;
        GD.Print(health);
    }  
    [Signal] delegate void nohealth();
}

Answer 1

Do you by chance have maxhealth value 5 in editor through export? In editor select stat node and check inspector for maxhealth value.