diff --git a/samples/gui/build.sh b/samples/gui/build.sh
index f73029a9..6d01f9dd 100755
--- a/samples/gui/build.sh
+++ b/samples/gui/build.sh
@@ -32,6 +32,17 @@ echo $PWD
 cp  lvgl_native_ui_app ${OUT_DIR}
 echo "#####################build native-ui-app success"
 
+
+echo "##################### 2. build littlevgl wasm runtime start#####################"
+cd $BUILD_DIR
+mkdir -p wasm-runtime-wgl
+cd wasm-runtime-wgl
+cmake ${PROJECT_DIR}/wasm-runtime-wgl/linux-build
+make
+cp wasm_runtime_wgl ${OUT_DIR}/
+
+echo "##################### build littlevgl wasm runtime end#####################"
+
 echo "#####################build host-tool"
 cd $BUILD_DIR
 mkdir -p host-tool
@@ -46,17 +57,6 @@ cp host_tool ${OUT_DIR}
 echo "#####################build host-tool success"
 
 
-echo "##################### 2. build littlevgl wasm runtime start#####################"
-cd $BUILD_DIR
-mkdir -p wasm-runtime-wgl
-cd wasm-runtime-wgl
-cmake ${PROJECT_DIR}/wasm-runtime-wgl/linux-build
-make
-cp wasm_runtime_wgl ${OUT_DIR}/
-
-echo "##################### build littlevgl wasm runtime end#####################"
-
-
 echo "##################### 3. build wasm ui app start#####################"
 cd ${PROJECT_DIR}/wasm-apps/wgl
 make
diff --git a/samples/gui/wasm-apps/lvgl-compatible/src/main.c b/samples/gui/wasm-apps/lvgl-compatible/src/main.c
index 867a516c..8f2c37a5 100644
--- a/samples/gui/wasm-apps/lvgl-compatible/src/main.c
+++ b/samples/gui/wasm-apps/lvgl-compatible/src/main.c
@@ -29,7 +29,7 @@ lv_obj_t *hello_world_label;
 lv_obj_t *count_label;
 lv_obj_t *btn1;
 lv_obj_t *label_count1;
-int label_count1_value = 0;
+int label_count1_value = 100;
 char label_count1_str[11] = { 0 };
 
 void timer1_update(user_timer_t timer1)
@@ -60,10 +60,10 @@ void on_init()
 
     /*Create a label on the button*/
     lv_obj_t *btn_label = lv_label_create(btn1, NULL);
-    lv_label_set_text(btn_label, "Click ++");
+    lv_label_set_text(btn_label, "Click --");
 
     label_count1 = lv_label_create(NULL, NULL);
-    lv_label_set_text(label_count1, "0");
+    lv_label_set_text(label_count1, "100");
     lv_obj_align(label_count1, NULL, LV_ALIGN_IN_BOTTOM_MID, 0, 0);
 
     /* set up a timer */
@@ -75,8 +75,10 @@ void on_init()
 static void btn_event_cb(lv_obj_t *btn, lv_event_t event)
 {
     if(event == LV_EVENT_RELEASED) {
-        label_count1_value++;
+        label_count1_value--;
         sprintf(label_count1_str, "%d", label_count1_value);
         lv_label_set_text(label_count1, label_count1_str);
+        if (label_count1_value == 0)
+            label_count1_value = 100;
     }
 }
diff --git a/samples/gui/wasm-runtime-wgl/linux-build/CMakeLists.txt b/samples/gui/wasm-runtime-wgl/linux-build/CMakeLists.txt
index 250c18f3..b27c9285 100644
--- a/samples/gui/wasm-runtime-wgl/linux-build/CMakeLists.txt
+++ b/samples/gui/wasm-runtime-wgl/linux-build/CMakeLists.txt
@@ -44,9 +44,8 @@ if (NOT ("$ENV{VALGRIND}" STREQUAL "YES"))
   add_definitions(-DNVALGRIND)
 endif ()
 
-# Currently build as 32-bit by default.
-set (BUILD_AS_64BIT_SUPPORT "NO")
-#set (BUILD_AS_64BIT_SUPPORT "YES")
+# Currently build as 64-bit by default.
+set (BUILD_AS_64BIT_SUPPORT "YES")
 
 if (CMAKE_SIZEOF_VOID_P EQUAL 8)
 if (${BUILD_AS_64BIT_SUPPORT} STREQUAL "YES")
diff --git a/samples/littlevgl/build.sh b/samples/littlevgl/build.sh
index cc1b72bb..f8a42bf0 100755
--- a/samples/littlevgl/build.sh
+++ b/samples/littlevgl/build.sh
@@ -32,6 +32,17 @@ echo $PWD
 cp  vgl_native_ui_app ${OUT_DIR}
 echo "#####################build native-ui-app success"
 
+
+echo "##################### 2. build littlevgl wasm runtime start#####################"
+cd $BUILD_DIR
+mkdir -p vgl-wasm-runtime
+cd vgl-wasm-runtime
+cmake ${PROJECT_DIR}/vgl-wasm-runtime
+make
+cp vgl_wasm_runtime ${OUT_DIR}/
+
+echo "##################### build littlevgl wasm runtime end#####################"
+
 echo "#####################build host-tool"
 cd $BUILD_DIR
 mkdir -p host-tool
@@ -46,17 +57,6 @@ cp host_tool ${OUT_DIR}
 echo "#####################build host-tool success"
 
 
-echo "##################### 2. build littlevgl wasm runtime start#####################"
-cd $BUILD_DIR
-mkdir -p vgl-wasm-runtime
-cd vgl-wasm-runtime
-cmake ${PROJECT_DIR}/vgl-wasm-runtime
-make
-cp vgl_wasm_runtime ${OUT_DIR}/
-
-echo "##################### build littlevgl wasm runtime end#####################"
-
-
 echo "##################### 3. build wasm ui app start#####################"
 cd ${PROJECT_DIR}/wasm-apps
 if [ ! -d "${PROJECT_DIR}/wasm-apps/lvgl" ]; then
diff --git a/samples/simple/CMakeLists.txt b/samples/simple/CMakeLists.txt
index 7966afb3..3dbf1a1f 100644
--- a/samples/simple/CMakeLists.txt
+++ b/samples/simple/CMakeLists.txt
@@ -15,8 +15,8 @@ if (NOT ("$ENV{VALGRIND}" STREQUAL "YES"))
   add_definitions(-DNVALGRIND)
 endif ()
 
-# Currently build as 32-bit by default.
-set (BUILD_AS_64BIT_SUPPORT "NO")
+# Currently build as 64-bit by default.
+set (BUILD_AS_64BIT_SUPPORT "YES")
 
 if (CMAKE_SIZEOF_VOID_P EQUAL 8)
 if (${BUILD_AS_64BIT_SUPPORT} STREQUAL "YES")
diff --git a/samples/simple/wasm-apps/gui_lvgl_compatible.c b/samples/simple/wasm-apps/gui_lvgl_compatible.c
index 867a516c..8f2c37a5 100644
--- a/samples/simple/wasm-apps/gui_lvgl_compatible.c
+++ b/samples/simple/wasm-apps/gui_lvgl_compatible.c
@@ -29,7 +29,7 @@ lv_obj_t *hello_world_label;
 lv_obj_t *count_label;
 lv_obj_t *btn1;
 lv_obj_t *label_count1;
-int label_count1_value = 0;
+int label_count1_value = 100;
 char label_count1_str[11] = { 0 };
 
 void timer1_update(user_timer_t timer1)
@@ -60,10 +60,10 @@ void on_init()
 
     /*Create a label on the button*/
     lv_obj_t *btn_label = lv_label_create(btn1, NULL);
-    lv_label_set_text(btn_label, "Click ++");
+    lv_label_set_text(btn_label, "Click --");
 
     label_count1 = lv_label_create(NULL, NULL);
-    lv_label_set_text(label_count1, "0");
+    lv_label_set_text(label_count1, "100");
     lv_obj_align(label_count1, NULL, LV_ALIGN_IN_BOTTOM_MID, 0, 0);
 
     /* set up a timer */
@@ -75,8 +75,10 @@ void on_init()
 static void btn_event_cb(lv_obj_t *btn, lv_event_t event)
 {
     if(event == LV_EVENT_RELEASED) {
-        label_count1_value++;
+        label_count1_value--;
         sprintf(label_count1_str, "%d", label_count1_value);
         lv_label_set_text(label_count1, label_count1_str);
+        if (label_count1_value == 0)
+            label_count1_value = 100;
     }
 }