diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 0000000..7e3328d
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,14 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Listen for Xdebug",
+            "type": "php",
+            "request": "launch",
+            "port": 9003
+        },
+    ]
+}
\ No newline at end of file
diff --git a/src/Encoding.php b/src/Encoding.php
index ac9db6e..58fb804 100644
--- a/src/Encoding.php
+++ b/src/Encoding.php
@@ -11,7 +11,7 @@ class Encoding
     public function __construct(&$mergeableRanks, $pattenRegex)
     {
         $this->mergeableRanks = $mergeableRanks;
-        $this->pattenRegex = $pattenRegex;
+        $this->pattenRegex = $pattenRegex . 'u'; // u for unicode
     }
 
     public function encodeOrdinary(string $text): array
diff --git a/tests/EncodingCl100kBaseTest.php b/tests/EncodingCl100kBaseTest.php
index 76988ca..5e9ec8a 100644
--- a/tests/EncodingCl100kBaseTest.php
+++ b/tests/EncodingCl100kBaseTest.php
@@ -7,10 +7,24 @@
 
 class EncodingCl100kBaseTest extends TestCase
 {
-    public function test() {
+    /**
+     * @dataProvider textDataProvider
+     */
+    public function testEncodeOrdinary($text, $expectedTokens) {
         $enc = EncodingFactory::createByEncodingName('cl100k_base');
-        $tokens = $enc->encodeOrdinary('tiktoken is great!');
+        $tokens = $enc->encodeOrdinary($text);
 
-        $this->assertSame([83, 1609, 5963, 374, 2294, 0], $tokens);
+        $this->assertSame($expectedTokens, $tokens);
     }
+
+    public static function textDataProvider()
+    {
+        return [
+            ['tiktoken is great!', [83, 1609, 5963, 374, 2294, 0]],
+            ['台北 101 高度 508 公尺', [55038, 49409, 220, 4645, 18630, 41519, 27479, 220, 19869, 35469, 105, 16175, 118]],
+            // TODO: 表情符號
+        ];
+    }
+
+    // TODO: Encode -> Decode chain
 }