diff --git a/src/json/ReflectionCache.cj b/src/json/ReflectionCache.cj
index a3bfeed..3fd8ca3 100644
--- a/src/json/ReflectionCache.cj
+++ b/src/json/ReflectionCache.cj
@@ -78,16 +78,14 @@ public class ReflectionCache {
 
     /**
      * 应用属性命名策略。
+     * 说明：不剥除字段名前导下划线——`_name` 原样输出 `_name`；
+     * 策略只影响字母大小写（CamelCase 首字母小写、SnakeCase 大写转下划线）。
      */
     public static func applyNamingPolicy(fieldName: String, policy: PropertyNamingPolicy): String {
-        var name = fieldName
-        while (name.startsWith("_")) {
-            name = name[1..]
-        }
         match (policy) {
-            case PropertyNamingPolicy.None => name
-            case PropertyNamingPolicy.CamelCase => toCamelCase(name)
-            case PropertyNamingPolicy.SnakeCase => toSnakeCase(name)
+            case PropertyNamingPolicy.None => fieldName
+            case PropertyNamingPolicy.CamelCase => toCamelCase(fieldName)
+            case PropertyNamingPolicy.SnakeCase => toSnakeCase(fieldName)
         }
     }