diff --git a/src/Qiniu/Storage/BucketManager.cs b/src/Qiniu/Storage/BucketManager.cs
index 36aebed..b4ff9cc 100644
--- a/src/Qiniu/Storage/BucketManager.cs
+++ b/src/Qiniu/Storage/BucketManager.cs
@@ -707,7 +707,8 @@ public HttpResult SetObjectLifecycle(
             int toIaAfterDays = 0,
             int toArchiveAfterDays = 0,
             int toDeepArchiveAfterDays = 0,
-            int deleteAfterDays = 0
+            int deleteAfterDays = 0,
+            int toArchiveIrAfterDays = 0
         )
         {
             return SetObjectLifecycle(
@@ -717,7 +718,8 @@ public HttpResult SetObjectLifecycle(
                 toIaAfterDays,
                 toArchiveAfterDays,
                 toDeepArchiveAfterDays,
-                deleteAfterDays
+                deleteAfterDays,
+                toArchiveIrAfterDays
             );
         }
 
@@ -728,6 +730,7 @@ public HttpResult SetObjectLifecycle(
         /// <param name="key">文件key</param>
         /// <param name="cond">匹配条件，只有条件匹配才会设置成功，目前支持：hash、mime、fsize、putTime</param>
         /// <param name="toIaAfterDays">多少天后将文件转为低频存储，设置为 -1 表示取消已设置的转低频存储的生命周期规则，0 表示不修改转低频生命周期规则。</param>
+        /// <param name="toArchiveIrAfterDays">多少天后将文件转为归档直读存储，设置为 -1 表示取消已设置的转归档直读存储的生命周期规则，0 表示不修改转归档直读生命周期规则。</param>
         /// <param name="toArchiveAfterDays">多少天后将文件转为归档存储，设置为 -1 表示取消已设置的转归档存储的生命周期规则，0 表示不修改转归档生命周期规则。</param>
         /// <param name="toDeepArchiveAfterDays">多少天后将文件转为深度归档存储，设置为 -1 表示取消已设置的转深度归档存储的生命周期规则，0 表示不修改转深度归档生命周期规则。</param>
         /// <param name="deleteAfterDays">多少天后将文件删除，设置为 -1 表示取消已设置的删除存储的生命周期规则，0 表示不修改删除存储的生命周期规则。</param>
@@ -739,7 +742,8 @@ public HttpResult SetObjectLifecycle(
             int toIaAfterDays = 0,
             int toArchiveAfterDays = 0,
             int toDeepArchiveAfterDays = 0,
-            int deleteAfterDays = 0
+            int deleteAfterDays = 0,
+            int toArchiveIrAfterDays = 0
         )
         {
             HttpResult result = new HttpResult();
@@ -747,7 +751,7 @@ public HttpResult SetObjectLifecycle(
             try
             {
                 string updateUrl = string.Format("{0}{1}", this.config.RsHost(this.mac.AccessKey, bucket),
-                    SetObjectLifecycleOp(bucket, key, cond, toIaAfterDays, toArchiveAfterDays, toDeepArchiveAfterDays, deleteAfterDays));
+                    SetObjectLifecycleOp(bucket, key, cond, toIaAfterDays, toArchiveAfterDays, toDeepArchiveAfterDays, deleteAfterDays, toArchiveIrAfterDays));
                 StringDictionary headers = new StringDictionary
                 {
                     {"Content-Type", ContentType.WWW_FORM_URLENC}
@@ -954,6 +958,7 @@ public string DeleteAfterDaysOp(string bucket, string key, int deleteAfterDays)
         /// <param name="key">文件key</param>
         /// <param name="cond">匹配条件，只有条件匹配才会设置成功，目前支持：hash、mime、fsize、putTime</param>
         /// <param name="toIaAfterDays">多少天后将文件转为低频存储，设置为 -1 表示取消已设置的转低频存储的生命周期规则，0 表示不修改转低频生命周期规则。</param>
+        /// <param name="toArchiveIrAfterDays">多少天后将文件转为归档直读存储，设置为 -1 表示取消已设置的转归档直读存储的生命周期规则，0 表示不修改转归档直读生命周期规则。</param>
         /// <param name="toArchiveAfterDays">多少天后将文件转为归档存储，设置为 -1 表示取消已设置的转归档存储的生命周期规则，0 表示不修改转归档生命周期规则。</param>
         /// <param name="toDeepArchiveAfterDays">多少天后将文件转为深度归档存储，设置为 -1 表示取消已设置的转深度归档存储的生命周期规则，0 表示不修改转深度归档生命周期规则。</param>
         /// <param name="deleteAfterDays">多少天后将文件删除，设置为 -1 表示取消已设置的删除存储的生命周期规则，0 表示不修改删除存储的生命周期规则。</param>
@@ -965,13 +970,14 @@ public string SetObjectLifecycleOp(
             int toIaAfterDays = 0,
             int toArchiveAfterDays = 0,
             int toDeepArchiveAfterDays = 0,
-            int deleteAfterDays = 0
+            int deleteAfterDays = 0,
+            int toArchiveIrAfterDays = 0
         )
         {
             string entry = Base64.UrlSafeBase64Encode(bucket, key);
             string result = string.Format(
-                "/lifecycle/{0}/toIAAfterDays/{1}/toArchiveAfterDays/{2}/toDeepArchiveAfterDays/{3}/deleteAfterDays/{4}",
-                entry, toIaAfterDays, toArchiveAfterDays, toDeepArchiveAfterDays, deleteAfterDays);
+                "/lifecycle/{0}/toIAAfterDays/{1}/toArchiveIRAfterDays/{2}/toArchiveAfterDays/{3}/toDeepArchiveAfterDays/{4}/deleteAfterDays/{5}",
+                entry, toIaAfterDays, toArchiveIrAfterDays, toArchiveAfterDays, toDeepArchiveAfterDays, deleteAfterDays);
 
             if (cond != null)
             {
diff --git a/src/Qiniu/Storage/FileInfo.cs b/src/Qiniu/Storage/FileInfo.cs
index 4a75d22..3d079be 100644
--- a/src/Qiniu/Storage/FileInfo.cs
+++ b/src/Qiniu/Storage/FileInfo.cs
@@ -79,9 +79,17 @@ public class FileInfo
         /// 文件在设置过期时间后才会返回该字段。
         /// 历史文件过期仍会自动删除，但不会返回该字段，重新设置文件过期时间可使历史文件返回该字段。
         /// </summary>
-        [JsonProperty("TransitionToIA", NullValueHandling = NullValueHandling.Ignore)]
+        [JsonProperty("transitionToIA", NullValueHandling = NullValueHandling.Ignore)]
         public int TransitionToIa { get; set; }
         
+        /// <summary>
+        /// 文件生命周期中转为归档直读存储的日期，Unix 时间戳格式。
+        /// 文件在设置过期时间后才会返回该字段。
+        /// 历史文件过期仍会自动删除，但不会返回该字段，重新设置文件过期时间可使历史文件返回该字段。
+        /// </summary>
+        [JsonProperty("transitionToArchiveIR", NullValueHandling = NullValueHandling.Ignore)]
+        public int TransitionToArchiveIr { get; set; }
+
         /// <summary>
         /// 文件生命周期中转为归档存储的日期，Unix 时间戳格式。
         /// 文件在设置过期时间后才会返回该字段。
diff --git a/src/QiniuTests/Storage/BucketManagerTests.cs b/src/QiniuTests/Storage/BucketManagerTests.cs
index 7677ffd..a22d596 100644
--- a/src/QiniuTests/Storage/BucketManagerTests.cs
+++ b/src/QiniuTests/Storage/BucketManagerTests.cs
@@ -267,7 +267,8 @@ public void SetObjectLifecycleTest()
                 10,
                 20,
                 30,
-                40);
+                40,
+                15);
             if (ret.Code != (int)HttpCode.OK)
             {
                 Assert.Fail("deleteAfterDays error: " + ret.ToString());
@@ -279,6 +280,7 @@ public void SetObjectLifecycleTest()
                 Assert.Fail("stat error: " + statRet.ToString());
             }
             Assert.True(statRet.Result.TransitionToIa > 0);
+            Assert.True(statRet.Result.TransitionToArchiveIr > 0);
             Assert.True(statRet.Result.TransitionToArchive > 0);
             Assert.True(statRet.Result.TransitionToDeepArchive > 0);
             Assert.True(statRet.Result.Expiration > 0);
@@ -318,7 +320,8 @@ public void SetObjectLifecycleCondTest()
                 10,
                 20,
                 30,
-                40);
+                40,
+                15);
             if (ret.Code != (int)HttpCode.OK)
             {
                 Assert.Fail("deleteAfterDays error: " + ret.ToString());