diff --git a/src/UserGuide/Master/IoTDB-Introduction/IoTDB-Introduction_timecho.md.md b/src/UserGuide/Master/IoTDB-Introduction/IoTDB-Introduction_timecho.md
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rename from src/UserGuide/Master/IoTDB-Introduction/IoTDB-Introduction_timecho.md.md
rename to src/UserGuide/Master/IoTDB-Introduction/IoTDB-Introduction_timecho.md
diff --git a/src/UserGuide/latest/IoTDB-Introduction/IoTDB-Introduction_timecho.md.md b/src/UserGuide/latest/IoTDB-Introduction/IoTDB-Introduction_timecho.md
similarity index 100%
rename from src/UserGuide/latest/IoTDB-Introduction/IoTDB-Introduction_timecho.md.md
rename to src/UserGuide/latest/IoTDB-Introduction/IoTDB-Introduction_timecho.md