diff --git a/BandoriBotCore/Config/PCRConfig.cs b/BandoriBotCore/Config/PCRConfig.cs
index 8cb5641..d8f5a41 100644
--- a/BandoriBotCore/Config/PCRConfig.cs
+++ b/BandoriBotCore/Config/PCRConfig.cs
@@ -73,10 +73,29 @@ private void Update()
             }
         }
 
+        private void LoadBossInfo()
+        {
+            try
+            {
+                bossInfo = JsonConvert.DeserializeObject<List<Boss>>(File.ReadAllText("bossinfo.json"));
+            }
+            catch
+            {
+                bossInfo = new List<Boss>
+                {
+                    new Boss
+                    {
+                        multiplier = new float[]{1f},
+                        name = "null",
+                        value = int.MaxValue
+                    }
+                };
+            }
+        }
+
         public override void LoadDefault()
         {
             data = new JsonConfig();
-            bossInfo = JsonConvert.DeserializeObject<List<Boss>>(File.ReadAllText("bossinfo.json"));
             Update();
         }
 
diff --git a/BandoriBotCore/Models/LogerLevel.cs b/BandoriBotCore/Models/LoggerLevel.cs
similarity index 100%
rename from BandoriBotCore/Models/LogerLevel.cs
rename to BandoriBotCore/Models/LoggerLevel.cs
diff --git a/BandoriBotCore/Program.cs b/BandoriBotCore/Program.cs
index ecce8c5..22df6a0 100644
--- a/BandoriBotCore/Program.cs
+++ b/BandoriBotCore/Program.cs
@@ -122,8 +122,6 @@ public static async Task Main(string[] args)
 
             var options = new MiraiHttpSessionOptions("127.0.0.1", 8080, "1234567890");
 
-            //var options = new MiraiHttpSessionOptions("139.9.234.121", 8080, "1234567890");
-            //args = new string[] { "2025551588" };
             await using var session = new MiraiHttpSession();
 
             session.AddPlugin(new MessageHandler());
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..59cdbe6
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2020 GUZZ07
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/readme.md b/readme.md
new file mode 100644
index 0000000..99471a1
--- /dev/null
+++ b/readme.md
@@ -0,0 +1,29 @@
+# BandoriBot
+
+A plugin based on Mirai-Csharp and mirai-http-api.
+
+This plugin has a basic message handling framework and permission control. Some functions attached are listed below:
+
+- Bandori station (powered by bandoristation.com)
+- Bandori gacha simulation (powered by bestdori.com)
+- Priconne clanbattle management
+- Priconne period rank query and client api call
+- Priconne Schedule query
+- Priconne arena query (powered by www.bigfun.cn)
+- Terraria Server Management
+- Custom Replies with regex or csharp code
+- Random Pixiv Images (powered by lolicon.app, pixiv.cat and api.imjad.cn)
+- Anti-revoke
+
+## Usage
+
+The plugin is not designed to be on-click-startup. So the authkey is hard-coded as `1234567890` and the http endpoint is `127.0.0.1:8080`. You need to pass the qq id to the program through commandline, for example:
+
+`botclient\bandoribot.exe 2025551588`
+
+To send a picture, you need to make a soft link from `imagecache` to the mirai-http-api images folder. The following command might be helpful:
+
+`mklink /j imagecache mirai\plugins\MiraiAPIHTTP\images`
+
+Some functions such as Gacha and Arena query need static resources, You need to download it from release and extract it into the folder.
+