diff --git a/models/policy.go b/models/policy.go
index f545c43..abe9c6e 100644
--- a/models/policy.go
+++ b/models/policy.go
@@ -22,8 +22,8 @@ type Policy struct {
 	BucketName         string
 	IsPrivate          bool
 	BaseURL            string
-	AccessKey          string `gorm:"size:512"`
-	SecretKey          string `gorm:"size:512"`
+	AccessKey          string `gorm:"size:1024"`
+	SecretKey          string `gorm:"size:1024"`
 	MaxSize            uint64
 	AutoRename         bool
 	DirNameRule        string
diff --git a/pkg/filesystem/driver/onedrive/api.go b/pkg/filesystem/driver/onedrive/api.go
index 56b6597..d3cfba9 100644
--- a/pkg/filesystem/driver/onedrive/api.go
+++ b/pkg/filesystem/driver/onedrive/api.go
@@ -310,8 +310,17 @@ func (client *Client) makeBatchDeleteRequestsBody(files []string) string {
 // GetThumbURL 获取给定尺寸的缩略图URL
 func (client *Client) GetThumbURL(ctx context.Context, dst string, w, h uint) (string, error) {
 	dst = strings.TrimPrefix(dst, "/")
-	cropOption := fmt.Sprintf("c%dx%d_Crop", w, h)
-	requestURL := client.getRequestURL("me/drive/root:/"+dst+":/thumbnails") + "?select=" + cropOption
+	var (
+		cropOption string
+		requestURL string
+	)
+	if client.Endpoints.isInChina {
+		cropOption = "large"
+		requestURL = client.getRequestURL("me/drive/root:/"+dst+":/thumbnails/0") + "/" + cropOption
+	} else {
+		cropOption = fmt.Sprintf("c%dx%d_Crop", w, h)
+		requestURL = client.getRequestURL("me/drive/root:/"+dst+":/thumbnails") + "?select=" + cropOption
+	}
 
 	res, err := client.requestWithStr(ctx, "GET", requestURL, "", 200)
 	if err != nil {
@@ -327,6 +336,10 @@ func (client *Client) GetThumbURL(ctx context.Context, dst string, w, h uint) (s
 		return "", decodeErr
 	}
 
+	if thumbRes.URL != "" {
+		return thumbRes.URL, nil
+	}
+
 	if len(thumbRes.Value) == 1 {
 		if res, ok := thumbRes.Value[0][cropOption]; ok {
 			return res.(map[string]interface{})["url"].(string), nil
@@ -386,6 +399,9 @@ func (client *Client) MonitorUpload(uploadURL, callbackKey, path string, size ui
 			}
 
 			// 成功获取分片上传状态，检查文件大小
+			if len(status.NextExpectedRanges) == 0 {
+				continue
+			}
 			sizeRange := strings.Split(
 				status.NextExpectedRanges[len(status.NextExpectedRanges)-1],
 				"-",
diff --git a/pkg/filesystem/driver/onedrive/client.go b/pkg/filesystem/driver/onedrive/client.go
index 61a7558..a5ca4ab 100644
--- a/pkg/filesystem/driver/onedrive/client.go
+++ b/pkg/filesystem/driver/onedrive/client.go
@@ -30,6 +30,7 @@ type Endpoints struct {
 	OAuthURL       string // OAuth认证的基URL
 	OAuthEndpoints *oauthEndpoint
 	EndpointURL    string // 接口请求的基URL
+	isInChina      bool   // 是否为世纪互联
 }
 
 // NewClient 根据存储策略获取新的client
diff --git a/pkg/filesystem/driver/onedrive/oauth.go b/pkg/filesystem/driver/onedrive/oauth.go
index 96521c7..aebaf6d 100644
--- a/pkg/filesystem/driver/onedrive/oauth.go
+++ b/pkg/filesystem/driver/onedrive/oauth.go
@@ -72,6 +72,10 @@ func (client *Client) getOAuthEndpoint() *oauthEndpoint {
 	case "login.live.com":
 		token, _ = url.Parse("https://login.live.com/oauth20_token.srf")
 		authorize, _ = url.Parse("https://login.live.com/oauth20_authorize.srf")
+	case "login.chinacloudapi.cn":
+		client.Endpoints.isInChina = true
+		token, _ = url.Parse("https://login.chinacloudapi.cn/common/oauth2/v2.0/token")
+		authorize, _ = url.Parse("https://login.chinacloudapi.cn/common/oauth2/v2.0/authorize")
 	default:
 		token, _ = url.Parse("https://login.microsoftonline.com/common/oauth2/v2.0/token")
 		authorize, _ = url.Parse("https://login.microsoftonline.com/common/oauth2/v2.0/authorize")
diff --git a/pkg/filesystem/driver/onedrive/types.go b/pkg/filesystem/driver/onedrive/types.go
index 5386c93..5730ead 100644
--- a/pkg/filesystem/driver/onedrive/types.go
+++ b/pkg/filesystem/driver/onedrive/types.go
@@ -79,6 +79,7 @@ type BatchResponse struct {
 // ThumbResponse 获取缩略图的响应
 type ThumbResponse struct {
 	Value []map[string]interface{} `json:"value"`
+	URL   string                   `json:"url"`
 }
 
 // Chunk 文件分片
diff --git a/pkg/filesystem/file.go b/pkg/filesystem/file.go
index 6eebc02..8ec5fd0 100644
--- a/pkg/filesystem/file.go
+++ b/pkg/filesystem/file.go
@@ -49,7 +49,7 @@ func (fs *FileSystem) AddFile(ctx context.Context, parent *model.Folder) (*model
 		if err := fs.Trigger(ctx, "BeforeAddFileFailed"); err != nil {
 			util.Log().Debug("BeforeAddFileFailed 钩子执行失败，%s", err)
 		}
-		return nil, ErrFileExisted.WithError(err)
+		return nil, err
 	}
 
 	file := ctx.Value(fsctx.FileHeaderCtx).(FileHeader)