diff --git a/libs/events.js b/libs/events.js
index f4ff1ea8..6f1f9710 100644
--- a/libs/events.js
+++ b/libs/events.js
@@ -142,7 +142,7 @@ events.prototype.afterChangeFloor = function (floorId) {
         core.playBgm('star.mid');
     }
     if (floorId == 'sample2') {
-        core.playBgm('G2_koko.mid');
+        core.playBgm('qianjin.mid');
     }
 }
 
diff --git a/main.js b/main.js
index 912a34f8..57d8f93c 100644
--- a/main.js
+++ b/main.js
@@ -47,7 +47,7 @@ function main() {
         'animates', 'enemys', 'hero', 'items', 'npcs', 'terrains'
     ];
     this.bgms = [ // 在此存放所有的bgm，和文件名一致。第一项为默认播放项
-        '058-Slow01.mid', 'bgm.mp3', 'heianmigong.mid', 'star.mid'
+        '058-Slow01.mid', 'bgm.mp3', 'qianjin.mid', 'star.mid'
     ];
     this.sounds = [ // 在此存放所有的SE，和文件名一致
         'floor.mp3', 'attack.ogg', 'door.ogg', 'item.ogg'
diff --git a/sounds/heianmigong.mid b/sounds/heianmigong.mid
deleted file mode 100644
index febdc238..00000000
Binary files a/sounds/heianmigong.mid and /dev/null differ
diff --git a/sounds/qianjin.mid b/sounds/qianjin.mid
new file mode 100644
index 00000000..b4236a96
Binary files /dev/null and b/sounds/qianjin.mid differ