diff --git a/SUMMARY.md b/SUMMARY.md
index b2d7abc19..4a27cf2e5 100644
--- a/SUMMARY.md
+++ b/SUMMARY.md
@@ -20,6 +20,7 @@
     - [2.2.13 CronJob](concepts/cronjob.md)
     - [2.2.14 Ingress](concepts/ingress.md)
     - [2.2.15 ConfigMap](concepts/configmap.md)
+    - [2.2.16 Horizontal Pod Autoscaling](concepts/horizontal-pod-autoscaling.md)
 - [3. 用户指南](guide/index.md)
   - [3.1 配置Pod的liveness和readiness探针](guide/configure-liveness-readiness-probes.md)
   - [3.2 管理集群中的TLS](guide/managing-tls-in-a-cluster.md)