diff --git a/bsp/apm32/libraries/APM32F10x_Library/APM32F10x_StdPeriphDriver/src/apm32f10x_pmu.c b/bsp/apm32/libraries/APM32F10x_Library/APM32F10x_StdPeriphDriver/src/apm32f10x_pmu.c
index 571ccabd92..969b1a98d7 100644
--- a/bsp/apm32/libraries/APM32F10x_Library/APM32F10x_StdPeriphDriver/src/apm32f10x_pmu.c
+++ b/bsp/apm32/libraries/APM32F10x_Library/APM32F10x_StdPeriphDriver/src/apm32f10x_pmu.c
@@ -198,7 +198,7 @@ void PMU_EnterSTANDBYMode(void)
 /*!
  * @brief     Read the specified PWR flag is set or not.
  *
- * @param     flag£ºReads the status of specifies the flag.
+ * @param     flag : Reads the status of specifies the flag.
  *                  This parameter can be one of the following values:
  *                    @arg PMU_FLAG_WUE : Wake Up flag
  *                    @arg PMU_FLAG_SB  : StandBy flag
@@ -226,7 +226,7 @@ uint8_t PMU_ReadStatusFlag(PMU_FLAG_T flag)
 /*!
  * @brief     Clears the PWR's pending flags.
  *
- * @param     flag£ºClears the status of specifies the flag.
+ * @param     flag : Clears the status of specifies the flag.
  *                  This parameter can be one of the following values:
  *                    @arg PMU_FLAG_WUE : Wake Up flag
  *                    @arg PMU_FLAG_SB  : StandBy flag