diff --git a/nni/experiment/config/convert.py b/nni/experiment/config/convert.py
index b07bf3acb0..254e4a498d 100644
--- a/nni/experiment/config/convert.py
+++ b/nni/experiment/config/convert.py
@@ -16,7 +16,9 @@
 def to_v2(v1) -> ExperimentConfig:
     v1 = copy.deepcopy(v1)
     platform = v1.pop('trainingServicePlatform')
-    assert platform in ['local', 'remote', 'openpai', 'aml']
+    assert platform in ['local', 'remote', 'pai', 'aml']
+    if platform == 'pai':
+        platform = 'openpai'
     v2 = ExperimentConfig(platform)
 
     _drop_field(v1, 'authorName')
@@ -88,7 +90,7 @@ def to_v2(v1) -> ExperimentConfig:
         if 'memoryMB' in v1_trial:
             ts.trial_memory_size = str(v1_trial.pop('memoryMB')) + 'mb'
         _move_field(v1_trial, ts, 'image', 'docker_image')
-        _deprecate(v1_trial, v2, 'virtualCluster')
+        _move_field(v1_trial, ts, 'virtualCluster', 'virtual_cluster')
         _move_field(v1_trial, ts, 'paiStorageConfigName', 'storage_config_name')
         _move_field(v1_trial, ts, 'paiConfigPath', 'openpaiConfigFile')
 
diff --git a/nni/experiment/config/openpai.py b/nni/experiment/config/openpai.py
index 66eecadac7..e941530f84 100644
--- a/nni/experiment/config/openpai.py
+++ b/nni/experiment/config/openpai.py
@@ -21,6 +21,7 @@ class OpenpaiConfig(TrainingServiceConfig):
     trial_memory_size: str
     storage_config_name: str
     docker_image: str = 'msranni/nni:latest'
+    virtual_cluster: Optional[str]
     local_storage_mount_point: PathLike
     container_storage_mount_point: str
     reuse_mode: bool = True
diff --git a/ts/nni_manager/common/experimentConfig.ts b/ts/nni_manager/common/experimentConfig.ts
index 7713bb94d4..6a3467722e 100644
--- a/ts/nni_manager/common/experimentConfig.ts
+++ b/ts/nni_manager/common/experimentConfig.ts
@@ -58,6 +58,7 @@ export interface OpenpaiConfig extends TrainingServiceConfig {
     containerStorageMountPoint: string;
     reuseMode: boolean;
     openpaiConfig?: object;
+    virtualCluster?: string;
 }
 
 /* AML */
@@ -198,7 +199,7 @@ export function toSeconds(time: string): number {
     throw new Error(`Bad time string "${time}"`);
 }
 
-const sizeUnits = { tb: 1024 * 1024, gb: 1024 * 1024, mb: 1, kb: 1 / 1024 };
+const sizeUnits = { tb: 1024 * 1024, gb: 1024, mb: 1, kb: 1 / 1024 };
 
 export function toMegaBytes(size: string): number {
     for (const [unit, factor] of Object.entries(sizeUnits)) {
diff --git a/ts/nni_manager/training_service/reusable/environments/openPaiEnvironmentService.ts b/ts/nni_manager/training_service/reusable/environments/openPaiEnvironmentService.ts
index 222b0b9e53..de913f0e65 100644
--- a/ts/nni_manager/training_service/reusable/environments/openPaiEnvironmentService.ts
+++ b/ts/nni_manager/training_service/reusable/environments/openPaiEnvironmentService.ts
@@ -5,6 +5,7 @@
 
 import * as yaml from 'js-yaml';
 import * as request from 'request';
+import { Container, Scope } from 'typescript-ioc';
 import { Deferred } from 'ts-deferred';
 import * as component from '../../../common/component';
 import { ExperimentConfig, OpenpaiConfig, flattenConfig, toMegaBytes } from '../../../common/experimentConfig';
@@ -15,6 +16,7 @@ import { NNIPAITrialConfig } from '../../pai/paiConfig';
 import { EnvironmentInformation, EnvironmentService } from '../environment';
 import { SharedStorageService } from '../sharedStorage';
 import { MountedStorageService } from '../storages/mountedStorageService';
+import { StorageService } from '../storageService';
 
 interface FlattenOpenpaiConfig extends ExperimentConfig, OpenpaiConfig { }
 
@@ -38,9 +40,10 @@ export class OpenPaiEnvironmentService extends EnvironmentService {
         this.config = flattenConfig(config, 'openpai');
         this.paiToken = this.config.token;
         this.protocol = this.config.host.toLowerCase().startsWith('https://') ? 'https' : 'http';
-
-        // FIXME: only support MountedStorageService
-        const storageService = new MountedStorageService();
+        Container.bind(StorageService)
+          .to(MountedStorageService)
+          .scope(Scope.Singleton);
+        const storageService = component.get<StorageService>(StorageService)
         const remoteRoot = storageService.joinPath(this.config.localStorageMountPoint, this.experimentId);
         storageService.initialize(this.config.localStorageMountPoint, remoteRoot);
     }
@@ -286,7 +289,7 @@ export class OpenPaiEnvironmentService extends EnvironmentService {
                         taskRetryCount: 0,
                         dockerImage: 'docker_image_0',
                         resourcePerInstance: {
-                            gpu: this.config.trialGpuNumber,
+                            gpu: this.config.trialGpuNumber === undefined? 0: this.config.trialGpuNumber,
                             cpu: this.config.trialCpuNumber,
                             memoryMB: toMegaBytes(this.config.trialMemorySize)
                         },
@@ -304,9 +307,9 @@ export class OpenPaiEnvironmentService extends EnvironmentService {
                     submitFrom: 'submit-job-v2'
                 }
             }
-            if (this.config.deprecated && this.config.deprecated.virtualCluster) {
+            if (this.config.virtualCluster) {
                 nniJobConfig.defaults = {
-                    virtualCluster: this.config.deprecated.virtualCluster
+                    virtualCluster: this.config.virtualCluster
                 }
             }
         }