diff --git a/.entry b/.entry
new file mode 100644
index 0000000..ead9c6d
--- /dev/null
+++ b/.entry
@@ -0,0 +1 @@
+BUILD_SYSTEM_ENTRY_DIR = "./booting.c"
diff --git a/booting.c b/booting.c
new file mode 100644
index 0000000..cdbe206
--- /dev/null
+++ b/booting.c
@@ -0,0 +1,28 @@
+// File: twelve_biubiu.c
+// Permission: CN-2082-2
+// Author: Li.YiYi
+// Dept: PE-362, UG
+// Origin: TI-352132
+// 春节十二响启动器 biu biu biu!
+
+#include "engine_rt.h"
+#include "engine_macros.h"
+#include "twelve_biubiu.h"
+
+int main() {
+    init();
+    // 允许误差10秒以内
+    if (unix_time() < make_unix_time(2082, 1, 28, 23, 59, 60-10)) return ERR_ENGIN_ENV;
+    int signal = engine_check_init();
+    // after compile and before real run
+    if(ENGINE_FAIL(signal)) {
+        return signal;
+    }
+    engine_processing(processing);
+    signal = engine_shutdown(final);
+    // 异常关闭
+    if(ENGINE_FAIL(signal)) {
+        return signal;
+    }
+    return ENGINE_SUCCESS;
+}
\ No newline at end of file
diff --git a/twelve_biubiu.c b/twelve_biubiu.c
index c67beba..66cc90a 100644
--- a/twelve_biubiu.c
+++ b/twelve_biubiu.c
@@ -7,14 +7,19 @@
 
 #env "planet_engine"
 
+#include "twelve_biubiu.h"
+#include "engine_rt.h"
+#include "engine_macros.h"
+
 int init() {
-    set_engine_number_mask(ENGINE_ALL);
+    set_engine_number_mask(ENGINE_EQUATOR_ALL);
     set_funeral_level(FUNERAL_FULL);
-    // 允许误差10秒以内
-    if (unix_time() < make_unix_time(2082, 1, 28, 23, 59, 60-10)) return ERR_ENGIN_ENV;
-    return engine_check_init(); // after compile and before real run
 }
-int main() {
+
+int processing(int32_t engineStatus) {
+    if(ENGINE_FAIL(engineStatus)) {
+        return engineStatus;
+    }
     set_curve(CURVE_NATURAL); // 自然曲线耗费燃料最少
     for (int i :range(0, 12, 1)) {
         engine_start();
@@ -26,6 +31,8 @@ int main() {
     }
     return 0;
 }
-int final() {
+
+int final(int32_t lastError) {
     engine_ensure_shutdown();
+    return lastError;
 }
diff --git a/twelve_biubiu.h b/twelve_biubiu.h
new file mode 100644
index 0000000..900edf2
--- /dev/null
+++ b/twelve_biubiu.h
@@ -0,0 +1,10 @@
+// File: twelve_biubiu.h
+// Permission: CN-2082-2
+// Author: Li.YiYi
+// Dept: PE-362, UG
+// Origin: TI-352132
+// 春节十二响 biu biu biu!
+
+extern int init()
+extern int processing(int32_t);
+extern int final(int32_t);
\ No newline at end of file