diff --git a/arkoala-arkts/arkui/src/sts/arkui.sts b/arkoala-arkts/arkui/src/sts/arkui.sts
index 2998691be7d9b53aec26e3b82cc1ee6327ae00af..58a5b1b1a086011f649f6d5a61032d2240641850 100644
--- a/arkoala-arkts/arkui/src/sts/arkui.sts
+++ b/arkoala-arkts/arkui/src/sts/arkui.sts
@@ -29,9 +29,15 @@ export abstract class StructBase<T, OptionsT> {
         console.log("Struct instantiate redirected")
         const instance = factory()
         if (builder !== undefined) builder(instance)
-        instance.build()
+        instance._build(builder, content, options)
+    }
+    build() {
+        throw new Error("The struct build() should never be executed directly")
+    }
+
+    protected _build(style: ((instance: T)=>T)|undefined, content: (() => void)|undefined, options: OptionsT|undefined) {
+        throw new Error("The struct _build() must have a valid override")
     }
-    build() {}
 }
 
 export enum Color {
@@ -141,7 +147,7 @@ export class Text extends CommonMethod {
         style(instance)
         //content()
     }
-    
+
     fontColor(value: Color): this {
         console.log("\.fontColor(", Color[value], ")")
         return this
diff --git a/arkoala-arkts/libarkts/plugins/src/struct-transformer.ts b/arkoala-arkts/libarkts/plugins/src/struct-transformer.ts
index 0959ea80a44b256a68cdef96a11ab7867c6ced2b..1243e1c914829e87f3edf093cbf01365e32d411f 100644
--- a/arkoala-arkts/libarkts/plugins/src/struct-transformer.ts
+++ b/arkoala-arkts/libarkts/plugins/src/struct-transformer.ts
@@ -13,7 +13,7 @@ function isCustomComponentClass(node: arkts.ClassDeclaration): boolean {
 function isKnownMethodDefinition(method: arkts.MethodDefinition, name: string): boolean {
     if (!method || !arkts.isMethodDefinition(method)) return false;
 
-    // For now, we only considered matched method name. 
+    // For now, we only considered matched method name.
     const isNameMatched: boolean = method.name?.name === name;
     return isNameMatched;
 }
@@ -64,9 +64,14 @@ function createContentArgInBuildMethod(): arkts.ETSParameterExpression {
         arkts.Es2pandaScriptFunctionFlags.SCRIPT_FUNCTION_FLAGS_ARROW
     );
 
+    const optionalContentLambda: arkts.ETSUnionType = arkts.factory.createUnionType([
+        contentLambda,
+        arkts.factory.createUndefinedLiteral()
+    ]);
+
     const contentParam: arkts.Identifier = arkts.factory.createIdentifier(
         'content',
-        contentLambda
+        optionalContentLambda
     );
 
     const param = arkts.factory.createParameterDeclaration(contentParam, undefined);
@@ -82,7 +87,7 @@ function createInitializerArgInBuildMethod(className: string): arkts.ETSParamete
             arkts.factory.createTypeReferenceFromId(
                 arkts.factory.createIdentifier(`__Options_${className}`)
             )
-        ).setOptional(true), 
+        ).setOptional(true),
         undefined
     );
 }
@@ -108,8 +113,8 @@ function transformBuildMethod(
     const params: arkts.ETSParameterExpression[] = prepareArgsInBuildMethod(className);
 
     const signature: arkts.FunctionSignature = arkts.FunctionSignature.create(
-        undefined, 
-        params, 
+        undefined,
+        params,
         undefined
     );
     const updateScriptFunction = arkts.factory.createScriptFunction(
@@ -146,7 +151,7 @@ function tranformClassMembers(node: arkts.ClassDeclaration): arkts.ClassDeclarat
                 arkts.Es2pandaModifierFlags.MODIFIER_FLAGS_CONSTRUCTOR,
                 false
             );
-        } 
+        }
         if (arkts.isMethodDefinition(member) && isKnownMethodDefinition(member, "build")) {
             return transformBuildMethod(member, className);
         }