--- a/application/api/service/Identity.php
+++ b/application/api/service/Identity.php
@@ -47,10 +47,25 @@
             $query->whereLike('identity_type', '%' . $keyword . '%');
         }
 
-        return $query->field(['id', 'identity_type', 'remark', 'create_by', 'create_time', 'update_time'])
+        $data = $query->field(['id', 'identity_type', 'remark', 'create_by', 'create_time', 'update_time'])
             ->order('id', 'desc')
             ->paginate($pageSize, false, ['page' => $page])
             ->toArray();
+        if (ltrim((string)config('database.type'), '\\') === \app\cores\database\Dm::class) {
+            foreach ($data['data'] as &$row) {
+                foreach (['create_time', 'update_time'] as $field) {
+                    $value = $row[$field] ?? null;
+                    if (is_string($value)
+                        && preg_match('/^((\d{4})-(\d{2})-(\d{2}) (\d{2}):(\d{2}):(\d{2}))\.0{1,6}$/D', $value, $match)
+                        && (int)$match[2] >= 1000 && checkdate((int)$match[3], (int)$match[4], (int)$match[2])
+                        && (int)$match[5] <= 23 && (int)$match[6] <= 59 && (int)$match[7] <= 59) {
+                        $row[$field] = $match[1];
+                    }
+                }
+            }
+            unset($row);
+        }
+        return $data;
     }
 
     /**