diff --git a/backend/services/contribution-service/src/application/services/contribution-calculation.service.ts b/backend/services/contribution-service/src/application/services/contribution-calculation.service.ts
index 665a9582..568af828 100644
--- a/backend/services/contribution-service/src/application/services/contribution-calculation.service.ts
+++ b/backend/services/contribution-service/src/application/services/contribution-calculation.service.ts
@@ -378,6 +378,7 @@ export class ContributionCalculationService {
           const recordEvent = new SystemContributionRecordCreatedEvent(
             savedRecord.id,
             sys.accountType,
+            sys.regionCode,  // 传递区域代码
             sourceAdoptionId,
             sourceAccountSequence,
             sys.rate.value.toNumber(),
diff --git a/backend/services/contribution-service/src/domain/events/system-contribution-record-created.event.ts b/backend/services/contribution-service/src/domain/events/system-contribution-record-created.event.ts
index 58100ce4..6ca1b87b 100644
--- a/backend/services/contribution-service/src/domain/events/system-contribution-record-created.event.ts
+++ b/backend/services/contribution-service/src/domain/events/system-contribution-record-created.event.ts
@@ -8,7 +8,8 @@ export class SystemContributionRecordCreatedEvent {
 
   constructor(
     public readonly recordId: bigint,                  // 明细记录ID
-    public readonly systemAccountType: string,         // 系统账户类型（组合键）
+    public readonly accountType: string,              // 系统账户类型（OPERATION/PROVINCE/CITY/HEADQUARTERS）
+    public readonly regionCode: string | null,        // 区域代码（省/市代码，如 440000, 440100）
     public readonly sourceAdoptionId: bigint,          // 来源认种ID
     public readonly sourceAccountSequence: string,     // 认种人账号
     public readonly distributionRate: number,          // 分配比例
@@ -22,7 +23,8 @@ export class SystemContributionRecordCreatedEvent {
     return {
       eventType: SystemContributionRecordCreatedEvent.EVENT_TYPE,
       recordId: this.recordId.toString(),
-      systemAccountType: this.systemAccountType,
+      accountType: this.accountType,
+      regionCode: this.regionCode,
       sourceAdoptionId: this.sourceAdoptionId.toString(),
       sourceAccountSequence: this.sourceAccountSequence,
       distributionRate: this.distributionRate,