diff --git a/FreeSql.Tests/MySql/Curd/MySqlSelectTest.cs b/FreeSql.Tests/MySql/Curd/MySqlSelectTest.cs
index cbe5383c..78292577 100644
--- a/FreeSql.Tests/MySql/Curd/MySqlSelectTest.cs
+++ b/FreeSql.Tests/MySql/Curd/MySqlSelectTest.cs
@@ -923,6 +923,15 @@ namespace FreeSql.Tests.MySql {
 
 			public int model2111Idaaa { get; set; }
 			public string title { get; set; }
+
+			public List<TestInclude_OneToManyModel4> childs2 { get; set; }
+		}
+		public class TestInclude_OneToManyModel4 {
+			[Column(IsIdentity = true)]
+			public int id { get; set; }
+
+			public int model3333Id333 { get; set; }
+			public string title444 { get; set; }
 		}
 
 		[Fact]
@@ -932,17 +941,32 @@ namespace FreeSql.Tests.MySql {
 			var model2 = new TestInclude_OneToManyModel2 { model2id = model1.id, m2setting = DateTime.Now.Second.ToString() };
 			g.mysql.Insert(model2).ExecuteAffrows();
 
-			var model3s = new[] {
-				new TestInclude_OneToManyModel3{ model2111Idaaa = model1.id, title = "testmodel3__111" },
-				new TestInclude_OneToManyModel3{ model2111Idaaa = model1.id, title = "testmodel3__222" },
-				new TestInclude_OneToManyModel3{ model2111Idaaa = model1.id, title = "testmodel3__333" }
+			var model3_1 = new TestInclude_OneToManyModel3 { model2111Idaaa = model1.id, title = "testmodel3__111" };
+			model3_1.id = (int)g.mysql.Insert(model3_1).ExecuteIdentity();
+			var model3_2 = new TestInclude_OneToManyModel3 { model2111Idaaa = model1.id, title = "testmodel3__222" };
+			model3_2.id = (int)g.mysql.Insert(model3_2).ExecuteIdentity();
+			var model3_3 = new TestInclude_OneToManyModel3 { model2111Idaaa = model1.id, title = "testmodel3__333" };
+			model3_3.id = (int)g.mysql.Insert(model3_2).ExecuteIdentity();
+
+			var model4s = new[] {
+				new TestInclude_OneToManyModel4{ model3333Id333 = model3_1.id, title444 = "testmodel3_4__111" },
+				new TestInclude_OneToManyModel4{ model3333Id333 = model3_1.id, title444 = "testmodel3_4__222" },
+				new TestInclude_OneToManyModel4{ model3333Id333 = model3_2.id, title444 = "testmodel3_4__111" },
+				new TestInclude_OneToManyModel4{ model3333Id333 = model3_2.id, title444 = "testmodel3_4__222" },
+				new TestInclude_OneToManyModel4{ model3333Id333 = model3_2.id, title444 = "testmodel3_4__333" }
 			};
-			Assert.Equal(3, g.mysql.Insert(model3s).ExecuteAffrows());
+			Assert.Equal(5, g.mysql.Insert(model4s).ExecuteAffrows());
 
 			var t1 = g.mysql.Select<TestInclude_OneToManyModel1>()
 				.IncludeMany(a => a.model2.childs.Where(m3 => m3.model2111Idaaa == a.model2.model2id))
 				.Where(a => a.id <= model1.id)
 				.ToList();
+
+			var t2 = g.mysql.Select<TestInclude_OneToManyModel1>()
+				.IncludeMany(a => a.model2.childs.Where(m3 => m3.model2111Idaaa == a.model2.model2id),
+					then => then.IncludeMany(m3 => m3.childs2.Where(m4 => m4.model3333Id333 == m3.id)))
+				.Where(a => a.id <= model1.id)
+				.ToList();
 		}
 		[Fact]
 		public void Include_OneToChilds() {
diff --git a/FreeSql.Tests/Oracle/Curd/OracleSelectTest.cs b/FreeSql.Tests/Oracle/Curd/OracleSelectTest.cs
index 8879cb26..3c09e1d3 100644
--- a/FreeSql.Tests/Oracle/Curd/OracleSelectTest.cs
+++ b/FreeSql.Tests/Oracle/Curd/OracleSelectTest.cs
@@ -816,6 +816,15 @@ namespace FreeSql.Tests.Oracle {
 
 			public int model2111Idaaa { get; set; }
 			public string title { get; set; }
+
+			public List<TiOtmModel4> childs2 { get; set; }
+		}
+		public class TiOtmModel4 {
+			[Column(IsIdentity = true)]
+			public int id { get; set; }
+
+			public int model3333Id333 { get; set; }
+			public string title444 { get; set; }
 		}
 
 		[Fact]
@@ -825,17 +834,32 @@ namespace FreeSql.Tests.Oracle {
 			var model2 = new TiOtmModel2 { model2id = model1.id, m2setting = DateTime.Now.Second.ToString() };
 			g.oracle.Insert(model2).ExecuteAffrows();
 
-			var model3s = new[] {
-				new TiOtmModel3{ model2111Idaaa = model1.id, title = "testmodel3__111" },
-				new TiOtmModel3{ model2111Idaaa = model1.id, title = "testmodel3__222" },
-				new TiOtmModel3{ model2111Idaaa = model1.id, title = "testmodel3__333" }
+			var model3_1 = new TiOtmModel3 { model2111Idaaa = model1.id, title = "testmodel3__111" };
+			model3_1.id = (int)g.oracle.Insert(model3_1).ExecuteIdentity();
+			var model3_2 = new TiOtmModel3 { model2111Idaaa = model1.id, title = "testmodel3__222" };
+			model3_2.id = (int)g.oracle.Insert(model3_2).ExecuteIdentity();
+			var model3_3 = new TiOtmModel3 { model2111Idaaa = model1.id, title = "testmodel3__333" };
+			model3_3.id = (int)g.oracle.Insert(model3_2).ExecuteIdentity();
+
+			var model4s = new[] {
+				new TiOtmModel4{ model3333Id333 = model3_1.id, title444 = "testmodel3_4__111" },
+				new TiOtmModel4{ model3333Id333 = model3_1.id, title444 = "testmodel3_4__222" },
+				new TiOtmModel4{ model3333Id333 = model3_2.id, title444 = "testmodel3_4__111" },
+				new TiOtmModel4{ model3333Id333 = model3_2.id, title444 = "testmodel3_4__222" },
+				new TiOtmModel4{ model3333Id333 = model3_2.id, title444 = "testmodel3_4__333" }
 			};
-			Assert.Equal(3, g.oracle.Insert(model3s).ExecuteAffrows());
+			Assert.Equal(5, g.oracle.Insert(model4s).ExecuteAffrows());
 
 			var t1 = g.oracle.Select<TiOtmModel1>()
 				.IncludeMany(a => a.model2.childs.Where(m3 => m3.model2111Idaaa == a.model2.model2id))
 				.Where(a => a.id <= model1.id)
 				.ToList();
+
+			var t2 = g.oracle.Select<TiOtmModel1>()
+				.IncludeMany(a => a.model2.childs.Where(m3 => m3.model2111Idaaa == a.model2.model2id),
+					then => then.IncludeMany(m3 => m3.childs2.Where(m4 => m4.model3333Id333 == m3.id)))
+				.Where(a => a.id <= model1.id)
+				.ToList();
 		}
 		[Fact]
 		public void Include_OneToChilds() {
diff --git a/FreeSql.Tests/PostgreSQL/Curd/PostgreSQLSelectTest.cs b/FreeSql.Tests/PostgreSQL/Curd/PostgreSQLSelectTest.cs
index 41249f7b..088b4545 100644
--- a/FreeSql.Tests/PostgreSQL/Curd/PostgreSQLSelectTest.cs
+++ b/FreeSql.Tests/PostgreSQL/Curd/PostgreSQLSelectTest.cs
@@ -882,6 +882,15 @@ namespace FreeSql.Tests.PostgreSQL {
 
 			public int model2111Idaaa { get; set; }
 			public string title { get; set; }
+
+			public List<TestInclude_OneToManyModel4> childs2 { get; set; }
+		}
+		public class TestInclude_OneToManyModel4 {
+			[Column(IsIdentity = true)]
+			public int id { get; set; }
+
+			public int model3333Id333 { get; set; }
+			public string title444 { get; set; }
 		}
 
 		[Fact]
@@ -891,17 +900,32 @@ namespace FreeSql.Tests.PostgreSQL {
 			var model2 = new TestInclude_OneToManyModel2 { model2id = model1.id, m2setting = DateTime.Now.Second.ToString() };
 			g.pgsql.Insert(model2).ExecuteAffrows();
 
-			var model3s = new[] {
-				new TestInclude_OneToManyModel3{ model2111Idaaa = model1.id, title = "testmodel3__111" },
-				new TestInclude_OneToManyModel3{ model2111Idaaa = model1.id, title = "testmodel3__222" },
-				new TestInclude_OneToManyModel3{ model2111Idaaa = model1.id, title = "testmodel3__333" }
+			var model3_1 = new TestInclude_OneToManyModel3 { model2111Idaaa = model1.id, title = "testmodel3__111" };
+			model3_1.id = (int)g.pgsql.Insert(model3_1).ExecuteIdentity();
+			var model3_2 = new TestInclude_OneToManyModel3 { model2111Idaaa = model1.id, title = "testmodel3__222" };
+			model3_2.id = (int)g.pgsql.Insert(model3_2).ExecuteIdentity();
+			var model3_3 = new TestInclude_OneToManyModel3 { model2111Idaaa = model1.id, title = "testmodel3__333" };
+			model3_3.id = (int)g.pgsql.Insert(model3_2).ExecuteIdentity();
+
+			var model4s = new[] {
+				new TestInclude_OneToManyModel4{ model3333Id333 = model3_1.id, title444 = "testmodel3_4__111" },
+				new TestInclude_OneToManyModel4{ model3333Id333 = model3_1.id, title444 = "testmodel3_4__222" },
+				new TestInclude_OneToManyModel4{ model3333Id333 = model3_2.id, title444 = "testmodel3_4__111" },
+				new TestInclude_OneToManyModel4{ model3333Id333 = model3_2.id, title444 = "testmodel3_4__222" },
+				new TestInclude_OneToManyModel4{ model3333Id333 = model3_2.id, title444 = "testmodel3_4__333" }
 			};
-			Assert.Equal(3, g.pgsql.Insert(model3s).ExecuteAffrows());
+			Assert.Equal(5, g.pgsql.Insert(model4s).ExecuteAffrows());
 
 			var t1 = g.pgsql.Select<TestInclude_OneToManyModel1>()
 				.IncludeMany(a => a.model2.childs.Where(m3 => m3.model2111Idaaa == a.model2.model2id))
 				.Where(a => a.id <= model1.id)
 				.ToList();
+
+			var t2 = g.pgsql.Select<TestInclude_OneToManyModel1>()
+				.IncludeMany(a => a.model2.childs.Where(m3 => m3.model2111Idaaa == a.model2.model2id),
+					then => then.IncludeMany(m3 => m3.childs2.Where(m4 => m4.model3333Id333 == m3.id)))
+				.Where(a => a.id <= model1.id)
+				.ToList();
 		}
 		[Fact]
 		public void Include_OneToChilds() {
diff --git a/FreeSql.Tests/SqlServer/Curd/SqlServerSelectTest.cs b/FreeSql.Tests/SqlServer/Curd/SqlServerSelectTest.cs
index 6aadf12b..3e37bf8b 100644
--- a/FreeSql.Tests/SqlServer/Curd/SqlServerSelectTest.cs
+++ b/FreeSql.Tests/SqlServer/Curd/SqlServerSelectTest.cs
@@ -813,6 +813,15 @@ namespace FreeSql.Tests.SqlServer {
 
 			public int model2111Idaaa { get; set; }
 			public string title { get; set; }
+
+			public List<TestInclude_OneToManyModel4> childs2 { get; set; }
+		}
+		public class TestInclude_OneToManyModel4 {
+			[Column(IsIdentity = true)]
+			public int id { get; set; }
+
+			public int model3333Id333 { get; set; }
+			public string title444 { get; set; }
 		}
 
 		[Fact]
@@ -822,17 +831,32 @@ namespace FreeSql.Tests.SqlServer {
 			var model2 = new TestInclude_OneToManyModel2 { model2id = model1.id, m2setting = DateTime.Now.Second.ToString() };
 			_sqlserverFixture.SqlServer.Insert(model2).ExecuteAffrows();
 
-			var model3s = new[] {
-				new TestInclude_OneToManyModel3{ model2111Idaaa = model1.id, title = "testmodel3__111" },
-				new TestInclude_OneToManyModel3{ model2111Idaaa = model1.id, title = "testmodel3__222" },
-				new TestInclude_OneToManyModel3{ model2111Idaaa = model1.id, title = "testmodel3__333" }
+			var model3_1 = new TestInclude_OneToManyModel3 { model2111Idaaa = model1.id, title = "testmodel3__111" };
+			model3_1.id = (int)_sqlserverFixture.SqlServer.Insert(model3_1).ExecuteIdentity();
+			var model3_2 = new TestInclude_OneToManyModel3 { model2111Idaaa = model1.id, title = "testmodel3__222" };
+			model3_2.id = (int)_sqlserverFixture.SqlServer.Insert(model3_2).ExecuteIdentity();
+			var model3_3 = new TestInclude_OneToManyModel3 { model2111Idaaa = model1.id, title = "testmodel3__333" };
+			model3_3.id = (int)_sqlserverFixture.SqlServer.Insert(model3_2).ExecuteIdentity();
+
+			var model4s = new[] {
+				new TestInclude_OneToManyModel4{ model3333Id333 = model3_1.id, title444 = "testmodel3_4__111" },
+				new TestInclude_OneToManyModel4{ model3333Id333 = model3_1.id, title444 = "testmodel3_4__222" },
+				new TestInclude_OneToManyModel4{ model3333Id333 = model3_2.id, title444 = "testmodel3_4__111" },
+				new TestInclude_OneToManyModel4{ model3333Id333 = model3_2.id, title444 = "testmodel3_4__222" },
+				new TestInclude_OneToManyModel4{ model3333Id333 = model3_2.id, title444 = "testmodel3_4__333" }
 			};
-			Assert.Equal(3, _sqlserverFixture.SqlServer.Insert(model3s).ExecuteAffrows());
+			Assert.Equal(5, _sqlserverFixture.SqlServer.Insert(model4s).ExecuteAffrows());
 
 			var t1 = _sqlserverFixture.SqlServer.Select<TestInclude_OneToManyModel1>()
 				.IncludeMany(a => a.model2.childs.Where(m3 => m3.model2111Idaaa == a.model2.model2id))
 				.Where(a => a.id <= model1.id)
 				.ToList();
+
+			var t2 = _sqlserverFixture.SqlServer.Select<TestInclude_OneToManyModel1>()
+				.IncludeMany(a => a.model2.childs.Where(m3 => m3.model2111Idaaa == a.model2.model2id),
+					then => then.IncludeMany(m3 => m3.childs2.Where(m4 => m4.model3333Id333 == m3.id)))
+				.Where(a => a.id <= model1.id)
+				.ToList();
 		}
 		[Fact]
 		public void Include_OneToChilds() {
diff --git a/FreeSql.Tests/Sqlite/Curd/SqliteSelectTest.cs b/FreeSql.Tests/Sqlite/Curd/SqliteSelectTest.cs
index 106561f6..cd7ea897 100644
--- a/FreeSql.Tests/Sqlite/Curd/SqliteSelectTest.cs
+++ b/FreeSql.Tests/Sqlite/Curd/SqliteSelectTest.cs
@@ -779,6 +779,15 @@ namespace FreeSql.Tests.Sqlite {
 
 			public int model2111Idaaa { get; set; }
 			public string title { get; set; }
+
+			public List<TestInclude_OneToManyModel4> childs2 { get; set; }
+		}
+		public class TestInclude_OneToManyModel4 {
+			[Column(IsIdentity = true)]
+			public int id { get; set; }
+
+			public int model3333Id333 { get; set; }
+			public string title444 { get; set; }
 		}
 
 		[Fact]
@@ -788,15 +797,30 @@ namespace FreeSql.Tests.Sqlite {
 			var model2 = new TestInclude_OneToManyModel2 { model2id = model1.id, m2setting = DateTime.Now.Second.ToString() };
 			g.sqlite.Insert(model2).ExecuteAffrows();
 
-			var model3s = new [] {
-				new TestInclude_OneToManyModel3{ model2111Idaaa = model1.id, title = "testmodel3__111" },
-				new TestInclude_OneToManyModel3{ model2111Idaaa = model1.id, title = "testmodel3__222" },
-				new TestInclude_OneToManyModel3{ model2111Idaaa = model1.id, title = "testmodel3__333" }
+			var model3_1 = new TestInclude_OneToManyModel3 { model2111Idaaa = model1.id, title = "testmodel3__111" };
+			model3_1.id = (int)g.sqlite.Insert(model3_1).ExecuteIdentity();
+			var model3_2 =new TestInclude_OneToManyModel3{ model2111Idaaa = model1.id, title = "testmodel3__222" };
+			model3_2.id = (int)g.sqlite.Insert(model3_2).ExecuteIdentity();
+			var model3_3 = new TestInclude_OneToManyModel3{ model2111Idaaa = model1.id, title = "testmodel3__333" };
+			model3_3.id = (int)g.sqlite.Insert(model3_2).ExecuteIdentity();
+
+			var model4s = new[] {
+				new TestInclude_OneToManyModel4{ model3333Id333 = model3_1.id, title444 = "testmodel3_4__111" },
+				new TestInclude_OneToManyModel4{ model3333Id333 = model3_1.id, title444 = "testmodel3_4__222" },
+				new TestInclude_OneToManyModel4{ model3333Id333 = model3_2.id, title444 = "testmodel3_4__111" },
+				new TestInclude_OneToManyModel4{ model3333Id333 = model3_2.id, title444 = "testmodel3_4__222" },
+				new TestInclude_OneToManyModel4{ model3333Id333 = model3_2.id, title444 = "testmodel3_4__333" }
 			};
-			Assert.Equal(3, g.sqlite.Insert(model3s).ExecuteAffrows());
+			Assert.Equal(5, g.sqlite.Insert(model4s).ExecuteAffrows());
 
 			var t1 = g.sqlite.Select<TestInclude_OneToManyModel1>()
-				.IncludeMany(a => a.model2.childs.Where(m3 => m3.model2111Idaaa == a.model2.model2id && m3.title == a.model2.m2setting))
+				.IncludeMany(a => a.model2.childs.Where(m3 => m3.model2111Idaaa == a.model2.model2id))
+				.Where(a => a.id <= model1.id)
+				.ToList();
+
+			var t2 = g.sqlite.Select<TestInclude_OneToManyModel1>()
+				.IncludeMany(a => a.model2.childs.Where(m3 => m3.model2111Idaaa == a.model2.model2id),
+					then => then.IncludeMany(m3 => m3.childs2.Where(m4 => m4.model3333Id333 == m3.id)))
 				.Where(a => a.id <= model1.id)
 				.ToList();
 		}