diff --git a/Source/3rdParty/HotenkaChineseConverter/HotenkaCCBridge.swift b/Source/3rdParty/HotenkaChineseConverter/HotenkaCCBridge.swift
index 525a8ece..e9962b6f 100644
--- a/Source/3rdParty/HotenkaChineseConverter/HotenkaCCBridge.swift
+++ b/Source/3rdParty/HotenkaChineseConverter/HotenkaCCBridge.swift
@@ -27,6 +27,34 @@ import Foundation
 public class ChineseConverter {
   public static let shared = HotenkaChineseConverter.init(plistDir: mgrLangModel.getBundleDataPath("convdict"))
 
+  /// 漢字數字大寫轉換專用辭典，順序為：康熙、當代繁體中文、日文、簡體中文。
+  private static let currencyNumeralDictTable: [String: (String, String, String, String)] = [
+    "一": ("壹", "壹", "壹", "壹"), "二": ("貳", "貳", "弐", "贰"), "三": ("叄", "參", "参", "叁"),
+    "四": ("肆", "肆", "肆", "肆"), "五": ("伍", "伍", "伍", "伍"), "六": ("陸", "陸", "陸", "陆"),
+    "七": ("柒", "柒", "柒", "柒"), "八": ("捌", "捌", "捌", "捌"), "九": ("玖", "玖", "玖", "玖"),
+    "十": ("拾", "拾", "拾", "拾"), "百": ("佰", "佰", "佰", "佰"), "千": ("仟", "仟", "仟", "仟"),
+    "万": ("萬", "萬", "萬", "万"), "〇": ("零", "零", "零", "零"),
+  ]
+
+  /// 將指定字串內的小寫漢字數字轉換為大寫，會對轉換對象進行直接修改操作。
+  /// - Parameter target: 轉換對象。
+  public static func ensureCurrencyNumerals(target: inout String) {
+    if !mgrPrefs.currencyNumeralsEnabled { return }
+    for key in currencyNumeralDictTable.keys {
+      guard let result = currencyNumeralDictTable[key] else { continue }
+      if IME.currentInputMode == InputMode.imeModeCHS {
+        target = target.replacingOccurrences(of: key, with: result.3)  // Simplified Chinese
+        continue
+      }
+      switch (mgrPrefs.chineseConversionEnabled, mgrPrefs.shiftJISShinjitaiOutputEnabled) {
+        case (false, true), (true, true): target = target.replacingOccurrences(of: key, with: result.2)  // JIS
+        case (true, false): target = target.replacingOccurrences(of: key, with: result.0)  // KangXi
+        default: target = target.replacingOccurrences(of: key, with: result.1)  // Contemporary
+      }
+    }
+    return
+  }
+
   /// CrossConvert.
   ///
   /// - Parameter string: Text in Original Script.