diff --git a/src/lvgl_private.h b/src/lvgl_private.h
index cda92217b..8ab64e973 100644
--- a/src/lvgl_private.h
+++ b/src/lvgl_private.h
@@ -70,7 +70,6 @@ extern "C" {
 #include "widgets/buttonmatrix/lv_buttonmatrix_private.h"
 #include "widgets/slider/lv_slider_private.h"
 #include "widgets/switch/lv_switch_private.h"
-#include "widgets/calendar/lv_calendar_chinese_private.h"
 #include "widgets/calendar/lv_calendar_private.h"
 #include "widgets/imagebutton/lv_imagebutton_private.h"
 #include "widgets/bar/lv_bar_private.h"
diff --git a/src/widgets/calendar/lv_calendar_chinese.c b/src/widgets/calendar/lv_calendar_chinese.c
index 81c844bf1..ee24133ad 100644
--- a/src/widgets/calendar/lv_calendar_chinese.c
+++ b/src/widgets/calendar/lv_calendar_chinese.c
@@ -6,7 +6,6 @@
 /*********************
  *      INCLUDES
  *********************/
-#include "lv_calendar_chinese_private.h"
 #include "lv_calendar_private.h"
 #if LV_USE_CALENDAR && LV_USE_CALENDAR_CHINESE
 
@@ -124,7 +123,7 @@ const char * lv_calendar_get_day_name(lv_calendar_date_t * gregorian)
 {
     uint16_t i, len;
     lv_calendar_chinese_t chinese_calendar;
-    chinese_calendar = lv_calendar_gregorian_to_chinese(gregorian);
+    lv_calendar_gregorian_to_chinese(gregorian, &chinese_calendar);
 
     if(gregorian->year > 2099 || gregorian->year < 1901)
         return NULL;
@@ -170,11 +169,11 @@ const char * lv_calendar_get_day_name(lv_calendar_date_t * gregorian)
     return (char *)chinese_calendar_day_name[chinese_calendar.today.day - 1];
 }
 
-lv_calendar_chinese_t lv_calendar_gregorian_to_chinese(lv_calendar_date_t * gregorian)
+void lv_calendar_gregorian_to_chinese(lv_calendar_date_t * gregorian_time, lv_calendar_chinese_t * chinese_time)
 {
-    uint16_t year = gregorian->year;
-    uint8_t month = gregorian->month;
-    uint8_t day = gregorian->day;
+    uint16_t year = gregorian_time->year;
+    uint8_t month = gregorian_time->month;
+    uint8_t day = gregorian_time->day;
 
     /*Record the number of days between the Spring Festival
     and the New Year's Day of that year.*/
@@ -191,14 +190,13 @@ lv_calendar_chinese_t lv_calendar_gregorian_to_chinese(lv_calendar_date_t * greg
     uint8_t index;
 
     bool leep_month;
-    lv_calendar_chinese_t chinese_calendar;
 
     if(year < 1901 || year > 2099) {
-        chinese_calendar.leep_month = 0;
-        chinese_calendar.today.year = 2000;
-        chinese_calendar.today.month = 1;
-        chinese_calendar.today.day = 1;
-        return chinese_calendar;
+        chinese_time->leep_month = 0;
+        chinese_time->today.year = 2000;
+        chinese_time->today.month = 1;
+        chinese_time->today.day = 1;
+        return;
     }
 
     if(((calendar_chinese_table[year - 1901] & 0x0060) >> 5) == 1)
@@ -274,11 +272,10 @@ lv_calendar_chinese_t lv_calendar_gregorian_to_chinese(lv_calendar_date_t * greg
 
         day = days_per_month - by_spring + 1;
     }
-    chinese_calendar.today.day = day;
-    chinese_calendar.today.month = month;
-    chinese_calendar.today.year = year;
-    chinese_calendar.leep_month = leep_month;
-    return chinese_calendar;
+    chinese_time->today.day = day;
+    chinese_time->today.month = month;
+    chinese_time->today.year = year;
+    chinese_time->leep_month = leep_month;
 }
 
 /**********************
diff --git a/src/widgets/calendar/lv_calendar_chinese.h b/src/widgets/calendar/lv_calendar_chinese.h
index 8d5b174ab..fb7a1bc0e 100644
--- a/src/widgets/calendar/lv_calendar_chinese.h
+++ b/src/widgets/calendar/lv_calendar_chinese.h
@@ -21,6 +21,15 @@ extern "C" {
  *      DEFINES
  *********************/
 
+/**********************
+ *      TYPEDEFS
+ **********************/
+
+typedef struct {
+    lv_calendar_date_t today;
+    bool leep_month;
+} lv_calendar_chinese_t;
+
 /**********************
  * GLOBAL PROTOTYPES
  **********************/
@@ -41,10 +50,10 @@ const char * lv_calendar_get_day_name(lv_calendar_date_t * gregorian);
 
 /**
  * Get the chinese time of the gregorian time (reference: https://www.cnblogs.com/liyang31tg/p/4123171.html)
- * @param gregorian   need to convert to chinese time in gregorian time
- * @return            return the chinese time of the gregorian time
+ * @param gregorian_time   need to convert to chinese time in gregorian time
+ * @param chinese_time     the chinese time convert from gregorian time
  */
-lv_calendar_chinese_t lv_calendar_gregorian_to_chinese(lv_calendar_date_t * gregorian);
+void lv_calendar_gregorian_to_chinese(lv_calendar_date_t * gregorian_time, lv_calendar_chinese_t * chinese_time);
 
 /**********************
  *      MACROS