diff --git a/docs/zh/06-advanced/06-TDgpt/06-dev/03-ad.md b/docs/zh/06-advanced/06-TDgpt/06-dev/03-ad.md
index 5b49db330e..c48ce42836 100644
--- a/docs/zh/06-advanced/06-TDgpt/06-dev/03-ad.md
+++ b/docs/zh/06-advanced/06-TDgpt/06-dev/03-ad.md
@@ -16,7 +16,7 @@ sidebar_label: "异常检测"
 
 ```python
 import numpy as np
-from service import AbstractAnomalyDetectionService
+from taosanalytics.service import AbstractAnomalyDetectionService
 
 # 算法实现类名称 需要以下划线 "_" 开始，并以 Service 结束
 class _MyAnomalyDetectionService(AbstractAnomalyDetectionService):