diff --git a/app/src/main/res/values-zh-rCN/strings.xml b/app/src/main/res/values-zh-rCN/strings.xml
index 7063f83e4..63a4096aa 100644
--- a/app/src/main/res/values-zh-rCN/strings.xml
+++ b/app/src/main/res/values-zh-rCN/strings.xml
@@ -723,4 +723,5 @@
     <string name="sync_warning_google_tasks_title">关于 Google Task 同步</string>
     <string name="sync_warning_google_tasks">不是所有任务详情都和 Google Tasks 同步</string>
     <string name="button_learn_more">了解更多</string>
+    <string name="subtasks_multilevel_microsoft">Microsoft To Do 不支持多层级子任务</string>
 </resources>
\ No newline at end of file