diff --git a/app/port/controller/package/DownloadPackageVersionTar.ts b/app/port/controller/package/DownloadPackageVersionTar.ts
index d53812da..75df3c4e 100644
--- a/app/port/controller/package/DownloadPackageVersionTar.ts
+++ b/app/port/controller/package/DownloadPackageVersionTar.ts
@@ -14,6 +14,8 @@ import { AbstractController } from '../AbstractController';
 import { FULLNAME_REG_STRING, getScopeAndName } from '../../../common/PackageUtil';
 import { NFSAdapter } from '../../../common/adapter/NFSAdapter';
 import { PackageManagerService } from '../../../core/service/PackageManagerService';
+import { ProxyModeService } from '../../../core/service/ProxyModeService';
+import { PackageSyncerService } from '../../../core/service/PackageSyncerService';
 import { SyncMode } from '../../../common/constants';
 
 @HTTPController()
@@ -21,6 +23,10 @@ export class DownloadPackageVersionTarController extends AbstractController {
   @Inject()
   private packageManagerService: PackageManagerService;
   @Inject()
+  private proxyModeService: ProxyModeService;
+  @Inject()
+  private packageSyncerService: PackageSyncerService;
+  @Inject()
   private nfsAdapter: NFSAdapter;
 
   @HTTPMethod({
@@ -42,8 +48,21 @@ export class DownloadPackageVersionTarController extends AbstractController {
 
     // check package version in database
     const allowSync = this.getAllowSync(ctx);
-    const pkg = await this.getPackageEntityByFullname(fullname, allowSync);
-    const packageVersion = await this.getPackageVersionEntity(pkg, version, allowSync);
+    let pkg;
+    let packageVersion;
+    try {
+      pkg = await this.getPackageEntityByFullname(fullname, allowSync);
+      packageVersion = await this.getPackageVersionEntity(pkg, version, allowSync);
+    } catch (error) {
+      if (this.config.cnpmcore.syncMode === SyncMode.proxy) {
+        // proxy mode package version not found.
+        const tgzBuffer = await this.#getTgzBuffer(ctx, fullname, version);
+        this.packageManagerService.plusPackageVersionCounter(fullname, version);
+        ctx.attachment(`${filenameWithVersion}.tgz`);
+        return tgzBuffer;
+      }
+      throw error;
+    }
 
     // read by nfs url
     if (downloadUrl) {
@@ -72,10 +91,25 @@ export class DownloadPackageVersionTarController extends AbstractController {
     path: `/:fullname(${FULLNAME_REG_STRING})/download/:fullnameWithVersion+.tgz`,
     method: HTTPMethodEnum.GET,
   })
+
   async deprecatedDownload(@Context() ctx: EggContext, @HTTPParam() fullname: string, @HTTPParam() fullnameWithVersion: string) {
     // /@emotion/utils/download/@emotion/utils-0.11.3.tgz
     // => /@emotion/utils/-/utils-0.11.3.tgz
     const filenameWithVersion = getScopeAndName(fullnameWithVersion)[1];
     return await this.download(ctx, fullname, filenameWithVersion);
   }
+
+  async #getTgzBuffer(ctx: EggContext, fullname: string, version: string) {
+    const { tgzBuffer } = await this.proxyModeService.getPackageVersionTarAndTempFilePath(fullname, ctx.url);
+    const task = await this.packageSyncerService.createTask(fullname, {
+      authorIp: ctx.ip,
+      authorId: `pid_${process.pid}`,
+      tips: `Sync specific version in proxy mode cause by "${ctx.href}"`,
+      skipDependencies: true,
+      specificVersions: [ version ],
+    });
+    ctx.logger.info('[DownloadPackageVersionTarController.createSyncTask:success] taskId: %s, fullname: %s',
+      task.taskId, fullname);
+    return tgzBuffer;
+  }
 }
diff --git a/app/port/controller/package/ShowPackageController.ts b/app/port/controller/package/ShowPackageController.ts
index 60fda994..46267c8a 100644
--- a/app/port/controller/package/ShowPackageController.ts
+++ b/app/port/controller/package/ShowPackageController.ts
@@ -12,6 +12,8 @@ import { getScopeAndName, FULLNAME_REG_STRING } from '../../../common/PackageUti
 import { isSyncWorkerRequest } from '../../../common/SyncUtil';
 import { PackageManagerService } from '../../../core/service/PackageManagerService';
 import { CacheService } from '../../../core/service/CacheService';
+import { SyncMode } from '../../../common/constants';
+import { ProxyModeService } from '../../../core/service/ProxyModeService';
 
 @HTTPController()
 export class ShowPackageController extends AbstractController {
@@ -19,6 +21,8 @@ export class ShowPackageController extends AbstractController {
   private packageManagerService: PackageManagerService;
   @Inject()
   private cacheService: CacheService;
+  @Inject()
+  private proxyModeService: ProxyModeService;
 
   @HTTPMethod({
     // GET /:fullname
@@ -64,10 +68,20 @@ export class ShowPackageController extends AbstractController {
 
     // handle cache miss
     let result: { etag: string; data: any, blockReason: string };
-    if (isFullManifests) {
-      result = await this.packageManagerService.listPackageFullManifests(scope, name, isSync);
+    if (this.config.cnpmcore.syncMode === SyncMode.proxy) {
+      // proxy mode
+      if (isFullManifests) {
+        result = await this.proxyModeService.getPackageFullManifests(fullname);
+      } else {
+        result = await this.proxyModeService.getPackageAbbreviatedManifests(fullname);
+      }
     } else {
-      result = await this.packageManagerService.listPackageAbbreviatedManifests(scope, name, isSync);
+      // sync mode
+      if (isFullManifests) {
+        result = await this.packageManagerService.listPackageFullManifests(scope, name, isSync);
+      } else {
+        result = await this.packageManagerService.listPackageAbbreviatedManifests(scope, name, isSync);
+      }
     }
     const { etag, data, blockReason } = result;
     // 404, no data
diff --git a/app/port/controller/package/ShowPackageVersionController.ts b/app/port/controller/package/ShowPackageVersionController.ts
index b80b3102..06f13b65 100644
--- a/app/port/controller/package/ShowPackageVersionController.ts
+++ b/app/port/controller/package/ShowPackageVersionController.ts
@@ -12,12 +12,16 @@ import { AbstractController } from '../AbstractController';
 import { getScopeAndName, FULLNAME_REG_STRING } from '../../../common/PackageUtil';
 import { isSyncWorkerRequest } from '../../../common/SyncUtil';
 import { PackageManagerService } from '../../../core/service/PackageManagerService';
+import { ProxyModeService } from '../../../core/service/ProxyModeService';
 import { Spec } from '../../../port/typebox';
+import { SyncMode } from '../../../common/constants';
 
 @HTTPController()
 export class ShowPackageVersionController extends AbstractController {
   @Inject()
   private packageManagerService: PackageManagerService;
+  @Inject()
+  private proxyModeService: ProxyModeService;
 
   @HTTPMethod({
     // GET /:fullname/:versionSpec
@@ -32,17 +36,25 @@ export class ShowPackageVersionController extends AbstractController {
     const abbreviatedMetaType = 'application/vnd.npm.install-v1+json';
     const isFullManifests = ctx.accepts([ 'json', abbreviatedMetaType ]) !== abbreviatedMetaType;
 
-    const { blockReason, manifest, pkg } = await this.packageManagerService.showPackageVersionManifest(scope, name, versionSpec, isSync, isFullManifests);
+    let { blockReason, manifest, pkg } = await this.packageManagerService.showPackageVersionManifest(scope, name, versionSpec, isSync, isFullManifests);
     if (!pkg) {
-      const allowSync = this.getAllowSync(ctx);
-      throw this.createPackageNotFoundErrorWithRedirect(fullname, undefined, allowSync);
+      if (this.config.cnpmcore.syncMode === SyncMode.proxy) {
+        manifest = await this.proxyModeService.getPackageVersionOrTagManifest(fullname, versionSpec);
+      } else {
+        const allowSync = this.getAllowSync(ctx);
+        throw this.createPackageNotFoundErrorWithRedirect(fullname, undefined, allowSync);
+      }
     }
     if (blockReason) {
       this.setCDNHeaders(ctx);
       throw this.createPackageBlockError(blockReason, fullname, versionSpec);
     }
     if (!manifest) {
-      throw new NotFoundError(`${fullname}@${versionSpec} not found`);
+      if (this.config.cnpmcore.syncMode === SyncMode.proxy) {
+        manifest = await this.proxyModeService.getPackageVersionOrTagManifest(fullname, versionSpec);
+      } else {
+        throw new NotFoundError(`${fullname}@${versionSpec} not found`);
+      }
     }
     this.setCDNHeaders(ctx);
     return manifest;