diff --git a/packages/cli/src/utils/apiPreconnect.test.ts b/packages/cli/src/utils/apiPreconnect.test.ts
index df80290a4..de4af8539 100644
--- a/packages/cli/src/utils/apiPreconnect.test.ts
+++ b/packages/cli/src/utils/apiPreconnect.test.ts
@@ -95,6 +95,39 @@ describe('apiPreconnect', () => {
       expect(mockFetch).not.toHaveBeenCalled();
     });
 
+    it('should accept DashScope regional endpoint (sg-singapore)', () => {
+      preconnectApi('openai', {
+        resolvedBaseUrl:
+          'https://dashscope-intl.aliyuncs.com/compatible-mode/v1',
+      });
+      expect(mockFetch).toHaveBeenCalledWith(
+        'https://dashscope-intl.aliyuncs.com/compatible-mode/v1',
+        expect.objectContaining({ method: 'HEAD' }),
+      );
+    });
+
+    it('should accept DashScope regional endpoint (us-virginia)', () => {
+      preconnectApi('openai', {
+        resolvedBaseUrl:
+          'https://dashscope-us.aliyuncs.com/compatible-mode/v1',
+      });
+      expect(mockFetch).toHaveBeenCalledWith(
+        'https://dashscope-us.aliyuncs.com/compatible-mode/v1',
+        expect.objectContaining({ method: 'HEAD' }),
+      );
+    });
+
+    it('should accept DashScope regional endpoint (cn-hongkong)', () => {
+      preconnectApi('openai', {
+        resolvedBaseUrl:
+          'https://cn-hongkong.dashscope.aliyuncs.com/compatible-mode/v1',
+      });
+      expect(mockFetch).toHaveBeenCalledWith(
+        'https://cn-hongkong.dashscope.aliyuncs.com/compatible-mode/v1',
+        expect.objectContaining({ method: 'HEAD' }),
+      );
+    });
+
     it('should fall back to default URL when resolvedBaseUrl is undefined', () => {
       preconnectApi('qwen-oauth');
       expect(mockFetch).toHaveBeenCalledWith(
diff --git a/packages/cli/src/utils/apiPreconnect.ts b/packages/cli/src/utils/apiPreconnect.ts
index 9a16e338d..c42f3922e 100644
--- a/packages/cli/src/utils/apiPreconnect.ts
+++ b/packages/cli/src/utils/apiPreconnect.ts
@@ -21,12 +21,16 @@ import {
   getOrCreateSharedDispatcher,
 } from '@qwen-code/qwen-code-core';
 
+import { ALIBABA_STANDARD_API_KEY_ENDPOINTS } from '../constants/alibabaStandardApiKey.js';
+
 const debugLogger = createDebugLogger('PRECONNECT');
 
 let preconnectFired = false;
 
 /**
- * Default API base URLs by AuthType
+ * Default API base URLs by AuthType.
+ * DashScope regional endpoints are derived from ALIBABA_STANDARD_API_KEY_ENDPOINTS
+ * so preconnect covers all supported regions (cn-beijing, sg-singapore, us-virginia, cn-hongkong).
  */
 const DEFAULT_BASE_URLS: Record<string, string> = {
   openai: 'https://api.openai.com',
@@ -35,6 +39,15 @@ const DEFAULT_BASE_URLS: Record<string, string> = {
   dashscope: 'https://dashscope.aliyuncs.com',
 };
 
+/**
+ * All known default base URLs, including DashScope regional endpoints.
+ * Used by isDefaultBaseUrl() to accept any supported default endpoint.
+ */
+const ALL_DEFAULT_URLS: string[] = [
+  ...Object.values(DEFAULT_BASE_URLS),
+  ...Object.values(ALIBABA_STANDARD_API_KEY_ENDPOINTS),
+];
+
 /**
  * Check if preconnect should be skipped due to environment conditions
  */
@@ -64,7 +77,7 @@ function isDefaultBaseUrl(baseUrl: string): boolean {
     .toLowerCase()
     .replace(/^https?:\/\//, '')
     .replace(/\/+$/, '');
-  return Object.values(DEFAULT_BASE_URLS).some((defaultUrl) => {
+  return ALL_DEFAULT_URLS.some((defaultUrl) => {
     const normalizedDefault = defaultUrl
       .toLowerCase()
       .replace(/^https?:\/\//, '')