diff --git a/MultiThreadingStudy.ConsoleApp/Program.cs b/MultiThreadingStudy.ConsoleApp/Program.cs
index eb459fd..c521401 100644
--- a/MultiThreadingStudy.ConsoleApp/Program.cs
+++ b/MultiThreadingStudy.ConsoleApp/Program.cs
@@ -4,7 +4,7 @@
     {
         static void Main(string[] args)
         {
-            Console.WriteLine("Hello, World!");
+            Console.WriteLine("多线程学习");
         }
     }
 }
\ No newline at end of file
diff --git a/MultiThreadingStudy.Core/Person.cs b/MultiThreadingStudy.Core/Person.cs
index 124accb..dce0855 100644
--- a/MultiThreadingStudy.Core/Person.cs
+++ b/MultiThreadingStudy.Core/Person.cs
@@ -5,8 +5,8 @@ namespace MultiThreadingStudy.Core
     public class Person
     {
         public int Id { get; set; } 
-        public string Name { get; set; }
-        public string Address { get; set; } 
+        public string? Name { get; set; }
+        public string? Address { get; set; } 
         public int Age { get; set; }
 
     }