diff --git a/NeoLang/.gitignore b/NeoLang/.gitignore
new file mode 100644
index 0000000..796b96d
--- /dev/null
+++ b/NeoLang/.gitignore
@@ -0,0 +1 @@
+/build
diff --git a/NeoLang/build.gradle b/NeoLang/build.gradle
new file mode 100644
index 0000000..b8ccbda
--- /dev/null
+++ b/NeoLang/build.gradle
@@ -0,0 +1,32 @@
+apply plugin: 'java-library'
+apply plugin: 'kotlin'
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    compile "org.jetbrains.kotlin:kotlin-stdlib-jre8:$kotlin_version"
+}
+
+sourceCompatibility = "1.7"
+targetCompatibility = "1.7"
+buildscript {
+    ext.kotlin_version = '1.1.3'
+    repositories {
+        mavenCentral()
+    }
+    dependencies {
+        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
+    }
+}
+repositories {
+    mavenCentral()
+}
+compileKotlin {
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+}
+compileTestKotlin {
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+}
diff --git a/NeoLang/example/main.neo b/NeoLang/example/main.neo
new file mode 100644
index 0000000..00f3c5c
--- /dev/null
+++ b/NeoLang/example/main.neo
@@ -0,0 +1,4 @@
+NeoLang {
+    version : 1
+    x-letter : ${NeoLang@version} >= 2
+}
diff --git a/NeoLang/src/main/java/io/neolang/Version.kt b/NeoLang/src/main/java/io/neolang/Version.kt
new file mode 100644
index 0000000..acf806d
--- /dev/null
+++ b/NeoLang/src/main/java/io/neolang/Version.kt
@@ -0,0 +1,10 @@
+package io.neolang
+
+/**
+ * @author kiva
+ */
+object Version {
+    const val MAJOR = 0
+    const val MINOR = 1
+    const val PATCH = 0
+}
\ No newline at end of file
diff --git a/NeoLang/src/main/java/io/neolang/token/Token.kt b/NeoLang/src/main/java/io/neolang/token/Token.kt
new file mode 100644
index 0000000..59abc5c
--- /dev/null
+++ b/NeoLang/src/main/java/io/neolang/token/Token.kt
@@ -0,0 +1,10 @@
+package io.neolang.token
+
+/**
+ * @author kiva
+ */
+class Token {
+    lateinit var type: TokenType
+    lateinit var value: Any
+    lateinit var nextToken: Token
+}
\ No newline at end of file
diff --git a/NeoLang/src/main/java/io/neolang/token/TokenType.kt b/NeoLang/src/main/java/io/neolang/token/TokenType.kt
new file mode 100644
index 0000000..28b0438
--- /dev/null
+++ b/NeoLang/src/main/java/io/neolang/token/TokenType.kt
@@ -0,0 +1,40 @@
+package io.neolang.token
+
+/**
+ * @author kiva
+ */
+enum class TokenType {
+    TYPE_IDENTIFIER,
+    TYPE_STRING,
+    TYPE_INTEGER,
+    TYPE_BOOLEAN,
+
+    KEYWORD_DOLLAR, /* $ */
+    KEYWORD_USE     /* @ */,
+
+    OPERATOR_BEGIN,
+    OPT_ADD, /* + */
+    OPT_SUB, /* - */
+    OPT_NAV, /* - (负号) */
+    OPT_MUL, /* * */
+    OPT_DIV, /* / */
+    OPT_MOD, /* % */
+    OPT_XOR, /* ^ */
+    OPT_AND, /* & */
+    OPT_OR, /* | */
+    LEFT_SHIFT, /* << */
+    RIGHT_SHIFT, /* >> */
+    OPERATOR_END,
+
+    LOGICAL_OPERATOR_BEGIN,
+    OPT_LAND, /* && */
+    OPT_LOR, /* || */
+    OPT_LE, /* <= */
+    OPT_LT, /* < */
+    OPT_GE, /* >= */
+    OPT_GT, /* > */
+    OPT_EQ, /* == */
+    OPT_NEQ, /* != */
+    OPT_NOT, /* ! */
+    LOGICAL_OPERATOR_END,
+}
\ No newline at end of file
diff --git a/app/build.gradle b/app/build.gradle
index 31cf3eb..fa776e8 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -17,8 +17,8 @@ android {
         applicationId "io.neoterm"
         minSdkVersion 21
         targetSdkVersion 25
-        versionCode 8
-        versionName "1.1.6"
+        versionCode 9
+        versionName "1.1.7"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
         resConfigs "zh"
         externalNativeBuild {
diff --git a/app/proguard-rules.pro b/app/proguard-rules.pro
index 1dc7dc7..5a1dafd 100644
--- a/app/proguard-rules.pro
+++ b/app/proguard-rules.pro
@@ -24,6 +24,10 @@
 # hide the original source file name.
 #-renamesourcefileattribute SourceFile
 
+-dontpreverify
+-printmapping proguardMapping.txt
+
+
 -keep class io.neoterm.backend.JNI {
 *;
 }
@@ -51,14 +55,14 @@
 #    <init>(java.lang.Throwable);
 #}
 
-#rxjava
--dontwarn rx.**
-#-keep class rx.** { *; }
-
 #skf4j
 -dontwarn org.slf4j.**
 
 -dontwarn sun.misc.**
+
+# RxJava
+#-keep class rx.** { *; }
+-dontwarn rx.**
 -keepclassmembers class rx.internal.util.unsafe.*ArrayQueue*Field* {
  long producerIndex;
  long consumerIndex;
@@ -69,3 +73,24 @@
 -keepclassmembers class rx.internal.util.unsafe.BaseLinkedQueueConsumerNodeRef {
  rx.internal.util.atomic.LinkedQueueNode consumerNode;
 }
+
+
+# Parcelable
+-keep class * implements android.os.Parcelable {
+  public static final android.os.Parcelable$Creator *;
+}
+-keepclassmembers class * implements android.os.Parcelable {
+ public <fields>;
+ private <fields>;
+}
+
+# Serializable
+-keepclassmembers class * implements java.io.Serializable {
+ static final long serialVersionUID;
+ private static final java.io.ObjectStreamField[] serialPersistentFields;
+ private void writeObject(java.io.ObjectOutputStream);
+ private void readObject(java.io.ObjectInputStream);
+ java.lang.Object writeReplace();
+ java.lang.Object readResolve();
+}
+
diff --git a/app/src/main/java/io/neoterm/customize/setup/BaseFileInstaller.java b/app/src/main/java/io/neoterm/customize/setup/BaseFileInstaller.java
index b093ace..c671ef4 100644
--- a/app/src/main/java/io/neoterm/customize/setup/BaseFileInstaller.java
+++ b/app/src/main/java/io/neoterm/customize/setup/BaseFileInstaller.java
@@ -11,10 +11,9 @@ import android.util.Pair;
 import java.io.BufferedReader;
 import java.io.File;
 import java.io.FileOutputStream;
-import java.io.InputStream;
+import java.io.IOException;
 import java.io.InputStreamReader;
 import java.net.HttpURLConnection;
-import java.net.MalformedURLException;
 import java.net.URL;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -24,8 +23,8 @@ import java.util.zip.ZipInputStream;
 
 import io.neoterm.R;
 import io.neoterm.backend.EmulatorDebug;
+import io.neoterm.preference.NeoPreference;
 import io.neoterm.preference.NeoTermPath;
-import io.neoterm.utils.FileUtils;
 
 public final class BaseFileInstaller {
     public interface ResultListener {
@@ -64,8 +63,9 @@ public final class BaseFileInstaller {
                     final byte[] buffer = new byte[8096];
                     final List<Pair<String, String>> symlinks = new ArrayList<>(50);
 
-                    final URL zipUrl = determineZipUrl();
-                    HttpURLConnection connection = (HttpURLConnection) zipUrl.openConnection();
+                    HttpURLConnection connection = openBaseFileConnection();
+                    connection.setConnectTimeout(8000);
+                    connection.setReadTimeout(8000);
                     totalBytes = connection.getContentLength();
 
                     try (ZipInputStream zipInput = new ZipInputStream(connection.getInputStream())) {
@@ -171,12 +171,22 @@ public final class BaseFileInstaller {
         }.start();
     }
 
-    private static URL determineZipUrl() throws MalformedURLException {
-        String archName = determineArchName();
-        String baseUrl = NeoTermPath.INSTANCE.getSERVER_BOOT_URL();
-        return new URL(baseUrl + "/" + archName + ".zip");
+    private static HttpURLConnection openBaseFileConnection() throws IOException {
+        String arch = determineArchName();
+        String baseUrl = NeoTermPath.INSTANCE.getDEFAULT_SOURCE();
+
+        // Use the same source
+        NeoPreference.INSTANCE.store(R.string.key_package_source, baseUrl);
+
+        return (HttpURLConnection) new URL(baseUrl + "/boot/" + arch + ".zip").openConnection();
     }
 
+//    private static URL determineZipUrl() throws MalformedURLException {
+//        String archName = determineArchName();
+//        String baseUrl = NeoTermPath.INSTANCE.getSERVER_BOOT_URL();
+//        return new URL(baseUrl + "/" + archName + ".zip");
+//    }
+
     private static String determineArchName() {
         for (String androidArch : Build.SUPPORTED_ABIS) {
             switch (androidArch) {
@@ -186,8 +196,8 @@ public final class BaseFileInstaller {
                     return "arm";
                 case "x86_64":
                     return "x86_64";
-                case "x86":
-                    return "i686";
+//                case "x86":
+//                    return "i686";
             }
         }
         throw new RuntimeException("Unable to determine arch from Build.SUPPORTED_ABIS =  " +
diff --git a/app/src/main/java/io/neoterm/preference/NeoPermission.kt b/app/src/main/java/io/neoterm/preference/NeoPermission.kt
index 7f768e1..ca82e69 100644
--- a/app/src/main/java/io/neoterm/preference/NeoPermission.kt
+++ b/app/src/main/java/io/neoterm/preference/NeoPermission.kt
@@ -3,6 +3,7 @@ package io.neoterm.preference
 import android.Manifest
 import android.app.Activity
 import android.app.AlertDialog
+import android.content.ActivityNotFoundException
 import android.content.DialogInterface
 import android.content.pm.PackageManager
 import android.os.Build
@@ -28,17 +29,23 @@ object NeoPermission {
                     Manifest.permission.READ_CONTACTS)) {
                 AlertDialog.Builder(context).setMessage("需要存储权限来访问存储设备上的文件")
                         .setPositiveButton(android.R.string.ok, { _: DialogInterface, _: Int ->
-                            ActivityCompat.requestPermissions(context,
-                                    arrayOf(Manifest.permission.READ_EXTERNAL_STORAGE),
-                                    requestCode)
+                            doRequestPermission(context, requestCode)
                         })
                         .show()
 
             } else {
-                ActivityCompat.requestPermissions(context,
-                        arrayOf(Manifest.permission.READ_EXTERNAL_STORAGE),
-                        requestCode)
+                doRequestPermission(context, requestCode)
             }
         }
     }
+
+    private fun doRequestPermission(context: Activity, requestCode: Int) {
+        try {
+            ActivityCompat.requestPermissions(context,
+                    arrayOf(Manifest.permission.READ_EXTERNAL_STORAGE),
+                    requestCode)
+        } catch (ignore: ActivityNotFoundException) {
+            // for MIUI, we ignore it.
+        }
+    }
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/neoterm/preference/NeoTermPath.kt b/app/src/main/java/io/neoterm/preference/NeoTermPath.kt
index d91d6f5..0936628 100644
--- a/app/src/main/java/io/neoterm/preference/NeoTermPath.kt
+++ b/app/src/main/java/io/neoterm/preference/NeoTermPath.kt
@@ -22,8 +22,8 @@ object NeoTermPath {
     const val SOURCE_FILE = "$USR_PATH/etc/apt/sources.list"
     const val PACKAGE_LIST_DIR = "$USR_PATH/var/lib/apt/lists"
 
-    private const val RELEASE_SOURCE = "https://mirrors.geekpie.org/neoterm"
-    private const val DEBUG_SOURCE = "http://192.243.117.135"
+    const val RELEASE_SOURCE = "https://mirrors.geekpie.org/neoterm"
+    const val DEBUG_SOURCE = "http://neoterm.studio"
 
     val DEFAULT_SOURCE: String
     val SERVER_BASE_URL: String
@@ -32,6 +32,6 @@ object NeoTermPath {
     init {
         DEFAULT_SOURCE = if (BuildConfig.DEBUG) DEBUG_SOURCE else RELEASE_SOURCE
         SERVER_BASE_URL = DEFAULT_SOURCE
-        SERVER_BOOT_URL = "${SERVER_BASE_URL}/boot"
+        SERVER_BOOT_URL = "$SERVER_BASE_URL/boot"
     }
 }
\ No newline at end of file
diff --git a/app/src/main/java/io/neoterm/ui/pm/PackageManagerActivity.kt b/app/src/main/java/io/neoterm/ui/pm/PackageManagerActivity.kt
index b85fc84..a546089 100644
--- a/app/src/main/java/io/neoterm/ui/pm/PackageManagerActivity.kt
+++ b/app/src/main/java/io/neoterm/ui/pm/PackageManagerActivity.kt
@@ -30,6 +30,7 @@ import io.neoterm.preference.NeoTermPath
 import io.neoterm.ui.pm.adapter.PackageAdapter
 import io.neoterm.ui.pm.model.PackageModel
 import io.neoterm.utils.FileUtils
+import io.neoterm.utils.PackageUtils
 import io.neoterm.view.TerminalDialog
 import java.io.File
 import java.net.URL
@@ -171,9 +172,7 @@ class PackageManagerActivity : AppCompatActivity(), SearchView.OnQueryTextListen
 
     private fun changeSourceInternal(source: String) {
         NeoPreference.store(R.string.key_package_source, source)
-
-        val sourceFile = File(NeoTermPath.SOURCE_FILE)
-        FileUtils.writeFile(sourceFile, generateSourceFile(source).toByteArray())
+        PackageUtils.syncSource()
         executeAptUpdate()
     }
 
@@ -220,15 +219,6 @@ class PackageManagerActivity : AppCompatActivity(), SearchView.OnQueryTextListen
         }.start()
     }
 
-    private fun generateSourceFile(source: String): String {
-        return StringBuilder().append("# Generated by NeoTerm-Preference\n")
-                .append("deb ")
-                .append(source)
-                .append(" stable main")
-                .append("\n")
-                .toString()
-    }
-
     private fun filter(models: List<PackageModel>, query: String?): List<PackageModel> {
         val filteredModelList = ArrayList<PackageModel>()
         if (query != null) {
diff --git a/app/src/main/java/io/neoterm/ui/setup/SetupActivity.kt b/app/src/main/java/io/neoterm/ui/setup/SetupActivity.kt
index ecb970e..95d9e83 100644
--- a/app/src/main/java/io/neoterm/ui/setup/SetupActivity.kt
+++ b/app/src/main/java/io/neoterm/ui/setup/SetupActivity.kt
@@ -21,6 +21,7 @@ import io.neoterm.customize.pm.NeoPackageManagerUtils
 import io.neoterm.customize.setup.BaseFileInstaller
 import io.neoterm.preference.NeoPreference
 import io.neoterm.preference.NeoTermPath
+import io.neoterm.utils.PackageUtils
 import io.neoterm.view.TerminalDialog
 import java.util.*
 
@@ -92,6 +93,7 @@ class SetupActivity : AppCompatActivity() {
         resultListener = BaseFileInstaller.ResultListener { error ->
             if (error == null) {
                 setResult(Activity.RESULT_OK)
+                PackageUtils.syncSource()
                 executeAptUpdate()
             } else {
                 AlertDialog.Builder(this@SetupActivity)
@@ -100,6 +102,7 @@ class SetupActivity : AppCompatActivity() {
                         .setNegativeButton(R.string.use_system_shell, { _, _ ->
                             setResult(Activity.RESULT_CANCELED)
                             nextButton.visibility = View.VISIBLE
+                            finish()
                         })
                         .setPositiveButton(R.string.retry, { dialog, _ ->
                             dialog.dismiss()
@@ -156,10 +159,12 @@ class SetupActivity : AppCompatActivity() {
                 val packageName = item.title
                 val pm = NeoPackageManager.get()
                 val packageInfo = pm.getPackageInfo(packageName)
-                val packageDesc = packageInfo.description
-                toast.cancel()
-                toast.setText(packageDesc)
-                toast.show()
+                if (packageInfo != null) {
+                    val packageDesc = packageInfo.description
+                    toast.cancel()
+                    toast.setText(packageDesc)
+                    toast.show()
+                }
             }
 
             override fun onBubbleDeselected(item: PickerItem) {
diff --git a/app/src/main/java/io/neoterm/utils/PackageUtils.kt b/app/src/main/java/io/neoterm/utils/PackageUtils.kt
new file mode 100644
index 0000000..37e3a27
--- /dev/null
+++ b/app/src/main/java/io/neoterm/utils/PackageUtils.kt
@@ -0,0 +1,26 @@
+package io.neoterm.utils
+
+import io.neoterm.R
+import io.neoterm.preference.NeoPreference
+import io.neoterm.preference.NeoTermPath
+import java.io.File
+
+/**
+ * @author kiva
+ */
+object PackageUtils {
+    fun syncSource() {
+        val source = NeoPreference.loadString(R.string.key_package_source, NeoTermPath.DEFAULT_SOURCE)
+        val sourceFile = File(NeoTermPath.SOURCE_FILE)
+        FileUtils.writeFile(sourceFile, generateSourceFile(source).toByteArray())
+    }
+
+    private fun generateSourceFile(source: String): String {
+        return StringBuilder().append("# Generated by NeoTerm-Preference\n")
+                .append("deb ")
+                .append(source)
+                .append(" stable main")
+                .append("\n")
+                .toString()
+    }
+}
\ No newline at end of file
diff --git a/settings.gradle b/settings.gradle
index db5559a..8f3cf9f 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -1 +1 @@
-include ':app', ':chrome-tabs'
+include ':app', ':chrome-tabs', ':NeoLang'