diff --git a/rc-service/rc-service-other/other-application/src/main/java/com/red/circle/other/app/service/user/impl/UserFreightBalanceRestServiceImpl.java b/rc-service/rc-service-other/other-application/src/main/java/com/red/circle/other/app/service/user/impl/UserFreightBalanceRestServiceImpl.java
index 24e1d59b..0468086d 100644
--- a/rc-service/rc-service-other/other-application/src/main/java/com/red/circle/other/app/service/user/impl/UserFreightBalanceRestServiceImpl.java
+++ b/rc-service/rc-service-other/other-application/src/main/java/com/red/circle/other/app/service/user/impl/UserFreightBalanceRestServiceImpl.java
@@ -19,9 +19,7 @@ import com.red.circle.wallet.inner.model.cmd.UserFreightBalancePageQryCmd;
 import com.red.circle.wallet.inner.model.dto.UserFreightBalanceDTO;
 import java.time.LocalDateTime;
 import java.time.temporal.ChronoUnit;
-import java.util.Map;
-import java.util.Optional;
-import java.util.Set;
+import java.util.*;
 import java.util.stream.Collectors;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
@@ -127,27 +125,24 @@ public class UserFreightBalanceRestServiceImpl implements UserFreightBalanceRest
    * @param countryFlagMap 国家代码到国旗URL的映射
    * @return 所有匹配的国旗URL（逗号分隔），如果没有匹配则返回空字符串
    */
-  private String matchNationalFlag(String supportedCountries, Map<String, String> countryFlagMap) {
+  private List<String> matchNationalFlag(String supportedCountries, Map<String, String> countryFlagMap) {
     if (supportedCountries == null || supportedCountries.isEmpty() || countryFlagMap.isEmpty()) {
-      return "";
+      return new  ArrayList<>(0);
     }
     
     // 分割支持的国家代码
     String[] countries = supportedCountries.split(",");
     
     // 收集所有匹配到的国旗URL
-    StringBuilder flagUrls = new StringBuilder();
+    List<String> flagUrls = new ArrayList<>();
     for (String country : countries) {
       String countryCode = country.trim();
       if (countryFlagMap.containsKey(countryCode)) {
-        if (!flagUrls.isEmpty()) {
-          flagUrls.append(",");
-        }
-        flagUrls.append(countryFlagMap.get(countryCode));
+        flagUrls.add(countryFlagMap.get(countryCode));
       }
     }
     
-    return flagUrls.toString();
+    return flagUrls;
   }
 
 }
diff --git a/rc-service/rc-service-other/other-client/src/main/java/com/red/circle/other/app/dto/clientobject/user/UserFreightBalanceCO.java b/rc-service/rc-service-other/other-client/src/main/java/com/red/circle/other/app/dto/clientobject/user/UserFreightBalanceCO.java
index ea8b48e4..70820bce 100644
--- a/rc-service/rc-service-other/other-client/src/main/java/com/red/circle/other/app/dto/clientobject/user/UserFreightBalanceCO.java
+++ b/rc-service/rc-service-other/other-client/src/main/java/com/red/circle/other/app/dto/clientobject/user/UserFreightBalanceCO.java
@@ -6,6 +6,8 @@ import com.red.circle.framework.dto.ClientObject;
 import com.red.circle.other.inner.model.dto.user.UserProfileDTO;
 import java.math.BigDecimal;
 import java.sql.Timestamp;
+import java.util.List;
+
 import lombok.Data;
 import lombok.EqualsAndHashCode;
 import lombok.experimental.Accessors;
@@ -131,6 +133,6 @@ public class UserFreightBalanceCO extends ClientObject {
   /**
    * 支持的国家国旗URL列表（根据supportedCountries匹配所有国旗，逗号分隔）.
    */
-  private String nationalFlag;
+  private List<String> nationalFlag;
 
 }