diff --git a/en/device-dev/subsystems/subsys-dfx.md b/en/device-dev/subsystems/subsys-dfx.md
index 993690cd1c6c172342df27f7bbe909dca53709bf..cce0e6ee8c57ea413f3df4b1f3c08306b6dc24ce 100644
--- a/en/device-dev/subsystems/subsys-dfx.md
+++ b/en/device-dev/subsystems/subsys-dfx.md
@@ -1,15 +1,14 @@
 # DFX Development Guide
 
--   [DFX Overview](subsys-dfx-overview.md)
--   [HiLog Development](subsys-dfx-hilog-rich.md)
--   [HiLog_Lite Development](subsys-dfx-hilog-lite.md)
--   [HiTrace Development](subsys-dfx-hitrace.md)
--   [HiCollie Development](subsys-dfx-hicollie.md)
--   [HiSysEvent Development](subsys-dfx-hisysevent.md)
-
-    -   [HiSysEvent Logging Configuration](subsys-dfx-hisysevent-logging-config.md)
-    -   [HiSysEvent Logging](subsys-dfx-hisysevent-logging.md)
-    -   [HiSysEvent Listening](subsys-dfx-hisysevent-listening.md)
-    -   [HiSysEvent Query](subsys-dfx-hisysevent-query.md)
-    -   [HiSysEvent Tool Usage](subsys-dfx-hisysevent-tool.md)
+- [DFX Overview](subsys-dfx-overview.md)
+- [HiLog Development](subsys-dfx-hilog-rich.md)
+- [HiLog_Lite Development](subsys-dfx-hilog-lite.md)
+- [HiTrace Development](subsys-dfx-hitrace.md)
+- [HiCollie Development](subsys-dfx-hicollie.md)
+- [HiSysEvent Development](subsys-dfx-hisysevent.md)
+  - [HiSysEvent Logging Configuration](subsys-dfx-hisysevent-logging-config.md)
+  - [HiSysEvent Logging](subsys-dfx-hisysevent-logging.md)
+  - [HiSysEvent Listening](subsys-dfx-hisysevent-listening.md)
+  - [HiSysEvent Query](subsys-dfx-hisysevent-query.md)
+  - [HiSysEvent Tool Usage](subsys-dfx-hisysevent-tool.md)