diff --git a/package.json b/package.json
index d5394d8..f011094 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "arsene",
-  "version": "1.0.1",
+  "version": "1.1.0",
   "description": "Arsene is a library for processing CJK text paragraphs, which are mixed with English characters and adding spacing between them.",
   "author": "Astrian Zheng",
   "keywords": [
diff --git a/readme.md b/readme.md
index 779ecfb..03aba82 100644
--- a/readme.md
+++ b/readme.md
@@ -33,19 +33,19 @@ function App() {
 ```
 
 ## 额外功能
-### 自定义空格宽度
+### 自定义间隙宽度
 ```ts
-arsene(selectedNode: string, spacing: 3|4|5|6|10 = 10)
+arsene(selectedNode: string, spacing: 's'|'m'|'l'|'xl'|'2xl' = 10)
 
 // sample
 arsene(node, 5)
 ```
-你可以在第二个参数中选择一个你认为合适的空格宽度。可选参数如下：
+你可以在第二个参数中选择一个你认为合适的间隙宽度。可选参数如下：
 
-- `3`：添加 1/3 em 空格 `U+2004`
-- `4`：添加 1/4 em 空格 `U+2005`
-- `5`：添加 1/5 em 空格 `U+2009`
-- `6`：添加 1/6 em 空格 `U+2006`
-- `10`：添加小空隙 `U+200A`
+- `2xl`：添加非常大间隙 `U+2004`
+- `xl`：添加超大间隙 `U+2005`
+- `l`：添加大间隙 `U+2009`
+- `m`：添加中间隙 `U+2006`
+- `s`：添加小间隙 `U+200A`
 
 默认（不填写第二个参数时）将添加 `U+200A`。
\ No newline at end of file
diff --git a/src/index.ts b/src/index.ts
index 6647ebc..216a079 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,19 +1,19 @@
-export default function (selectedNode: string, spacing: 3|4|5|6|10 = 10) {
+export default function (selectedNode: string, spacing: '2xl'|'xl'|'l'|'m'|'s' = 's') {
   let spacingCharacter = ''
   switch (spacing) {
-    case 3:
+    case '2xl':
       spacingCharacter = '\u2004'
       break
-    case 4:
+    case 'xl':
       spacingCharacter = '\u2005'
       break
-    case 5:
+    case 'l':
       spacingCharacter = '\u2009'
       break
-    case 6:
+    case 'm':
       spacingCharacter = '\u2006'
       break
-    case 10:
+    case 's':
       spacingCharacter = '\u200A'
       break
     default: