diff --git a/src/main/java/com/gameplatform/server/service/device/DeviceStatusCheckService.java b/src/main/java/com/gameplatform/server/service/device/DeviceStatusCheckService.java
index 2d2cfcf..c8e2e71 100644
--- a/src/main/java/com/gameplatform/server/service/device/DeviceStatusCheckService.java
+++ b/src/main/java/com/gameplatform/server/service/device/DeviceStatusCheckService.java
@@ -165,6 +165,7 @@ public class DeviceStatusCheckService {
         for (LinkTask task : loggedInTasks) {
             try {
                 task.setStatus("COMPLETED");
+                task.setReason("设备空闲兜底完成");
                 task.setCompletedPoints(points);
                 task.setUpdatedAt(LocalDateTime.now());
                 
diff --git a/src/main/java/com/gameplatform/server/service/link/DeviceAllocationService.java b/src/main/java/com/gameplatform/server/service/link/DeviceAllocationService.java
index 7a74a26..b4b99e4 100644
--- a/src/main/java/com/gameplatform/server/service/link/DeviceAllocationService.java
+++ b/src/main/java/com/gameplatform/server/service/link/DeviceAllocationService.java
@@ -108,6 +108,7 @@ public class DeviceAllocationService {
                     if (shouldExpire) {
                         String prev = task.getStatus();
                         task.setStatus("EXPIRED");
+                        task.setReason("USING超时10分钟自动过期");
                         task.setUpdatedAt(now);
                         int updated = linkTaskMapper.update(task);
                         if (updated > 0) {
@@ -143,6 +144,7 @@ public class DeviceAllocationService {
                     if (shouldComplete) {
                         String prev = task.getStatus();
                         task.setStatus("COMPLETED");
+                        task.setReason("LOGGED_IN超过30分钟自动完成");
                         task.setUpdatedAt(now);
                         int updated = linkTaskMapper.update(task);
                         if (updated > 0) {
diff --git a/src/main/java/com/gameplatform/server/service/link/LinkStatusService.java b/src/main/java/com/gameplatform/server/service/link/LinkStatusService.java
index 1f97363..47ea430 100644
--- a/src/main/java/com/gameplatform/server/service/link/LinkStatusService.java
+++ b/src/main/java/com/gameplatform/server/service/link/LinkStatusService.java
@@ -225,6 +225,7 @@ public class LinkStatusService {
     
             // 5. 更新链接状态为 REFUNDED
             linkTask.setStatus("REFUNDED");
+            linkTask.setReason("状态：已退款");
             linkTask.setRefundAt(LocalDateTime.now());
             linkTask.setUpdatedAt(LocalDateTime.now());
             
@@ -532,6 +533,7 @@ private UserLinkStatusResponse doGetUserLinkStatus(Long linkId, String codeNo) {
             log.warn("链接任务已过期: expireAt={}", linkTask.getExpireAt());
             LocalDateTime now = LocalDateTime.now();
             linkTask.setStatus("EXPIRED");
+            linkTask.setReason("状态：已过期");
             linkTask.setExpireAt(now);  // 设置过期时间戳
             linkTask.setUpdatedAt(now);
             // Note: The following line was incomplete/incorrect in the original. 
@@ -564,6 +566,7 @@ private UserLinkStatusResponse doGetUserLinkStatus(Long linkId, String codeNo) {
 
                 LocalDateTime now = LocalDateTime.now();
                 linkTask.setStatus("EXPIRED");
+                linkTask.setReason("状态：已过期（10分钟未登录）");
                 linkTask.setExpireAt(now);  // 设置过期时间戳
                 linkTask.setUpdatedAt(now);
                 // Note: The following line was incomplete/incorrect in the original.
@@ -698,6 +701,7 @@ private UserLinkStatusResponse doGetUserLinkStatus(Long linkId, String codeNo) {
                     if(!linkTask.getStatus().equals("USING")){
                         LocalDateTime now = LocalDateTime.now();
                         linkTask.setStatus("USING");
+                        linkTask.setReason("首次选区");
                         linkTask.setUpdatedAt(now);
                         linkTaskMapper.updateById(linkTask);
                     }
@@ -733,6 +737,7 @@ private UserLinkStatusResponse doGetUserLinkStatus(Long linkId, String codeNo) {
                     if(!linkTask.getStatus().equals("USING")){
                         LocalDateTime now = LocalDateTime.now();
                         linkTask.setStatus("USING");
+                        linkTask.setReason("重复选区");
                         linkTask.setUpdatedAt(now);
                         linkTaskMapper.updateById(linkTask);
                     }
@@ -752,6 +757,7 @@ private UserLinkStatusResponse doGetUserLinkStatus(Long linkId, String codeNo) {
                         
                         // 将链接状态设置为过期
                         linkTask.setStatus("EXPIRED");
+                        linkTask.setReason("首次选区已过期");
                         linkTask.setExpireAt(now);  // 设置过期时间戳
                         linkTask.setUpdatedAt(now);
                         linkTaskMapper.updateById(linkTask);
@@ -1042,6 +1048,7 @@ private UserLinkStatusResponse doGetUserLinkStatus(Long linkId, String codeNo) {
             linkTask.setLoginAt(now);
         }
         linkTask.setStatus("LOGGED_IN");
+        linkTask.setReason("状态：已登录");
         linkTask.setUpdatedAt(now);
         linkTaskMapper.updateById(linkTask);