diff --git a/doc/001.Introduction.md b/doc/01.Introduction.md
similarity index 100%
rename from doc/001.Introduction.md
rename to doc/01.Introduction.md
diff --git a/doc/002.Help.md b/doc/02.Help.md
similarity index 100%
rename from doc/002.Help.md
rename to doc/02.Help.md
diff --git a/doc/003.Summary.md b/doc/03.Summary.md
similarity index 100%
rename from doc/003.Summary.md
rename to doc/03.Summary.md
diff --git a/doc/004.Development_Manual.md b/doc/04.Development_Manual.md
similarity index 100%
rename from doc/004.Development_Manual.md
rename to doc/04.Development_Manual.md
diff --git a/doc/005.SDK_Manual.md b/doc/05.SDK_Manual.md
similarity index 100%
rename from doc/005.SDK_Manual.md
rename to doc/05.SDK_Manual.md
diff --git a/doc/006.FAQ.md b/doc/06.FAQ.md
similarity index 100%
rename from doc/006.FAQ.md
rename to doc/06.FAQ.md
diff --git a/doc/007.Glossary.md b/doc/07.Glossary.md
similarity index 100%
rename from doc/007.Glossary.md
rename to doc/07.Glossary.md
diff --git a/doc/008.QCloud_IoTHub_Quick_Start.md b/doc/08.QCloud_IoTHub_Quick_Start.md
similarity index 100%
rename from doc/008.QCloud_IoTHub_Quick_Start.md
rename to doc/08.QCloud_IoTHub_Quick_Start.md
diff --git a/doc/009.Code_Directories.md b/doc/09.Code_Directories.md
similarity index 100%
rename from doc/009.Code_Directories.md
rename to doc/09.Code_Directories.md
diff --git a/doc/010.Porting_Manual_for_KEIL.md b/doc/10.Porting_Manual_for_KEIL.md
similarity index 100%
rename from doc/010.Porting_Manual_for_KEIL.md
rename to doc/10.Porting_Manual_for_KEIL.md
diff --git a/doc/011.Porting_Manual_for_IAR.md b/doc/11.Porting_Manual_for_IAR.md
similarity index 100%
rename from doc/011.Porting_Manual_for_IAR.md
rename to doc/11.Porting_Manual_for_IAR.md
diff --git a/doc/012.Porting_Manual_for_GCC.md b/doc/12.Porting_Manual_for_GCC.md
similarity index 100%
rename from doc/012.Porting_Manual_for_GCC.md
rename to doc/12.Porting_Manual_for_GCC.md
diff --git a/doc/013.Porting_Manual_for_MacOS_STM32CubeIDE.md b/doc/13.Porting_Manual_for_MacOS_STM32CubeIDE.md
similarity index 100%
rename from doc/013.Porting_Manual_for_MacOS_STM32CubeIDE.md
rename to doc/13.Porting_Manual_for_MacOS_STM32CubeIDE.md
diff --git a/doc/014.RISC-V_Eclipse_Environment_Quick_Start.md b/doc/14.RISC-V_Eclipse_Environment_Quick_Start.md
similarity index 100%
rename from doc/014.RISC-V_Eclipse_Environment_Quick_Start.md
rename to doc/14.RISC-V_Eclipse_Environment_Quick_Start.md
diff --git a/doc/015.TencentOS_tiny_EVB_MX_Plus_Quick_Start.md b/doc/15.TencentOS_tiny_EVB_MX_Plus_Quick_Start.md
similarity index 100%
rename from doc/015.TencentOS_tiny_EVB_MX_Plus_Quick_Start.md
rename to doc/15.TencentOS_tiny_EVB_MX_Plus_Quick_Start.md
diff --git a/doc/016.TencentOS_tiny_LoRaWAN_Getting_Started_Guide.md b/doc/16.TencentOS_tiny_LoRaWAN_Getting_Started_Guide.md
similarity index 100%
rename from doc/016.TencentOS_tiny_LoRaWAN_Getting_Started_Guide.md
rename to doc/16.TencentOS_tiny_LoRaWAN_Getting_Started_Guide.md