diff --git a/en/option/series/bar.md b/en/option/series/bar.md
index 1aa31aed4..da42c93ff 100644
--- a/en/option/series/bar.md
+++ b/en/option/series/bar.md
@@ -80,6 +80,10 @@ Background style of each bar if [showBackground](~series-bar.showBackground) is
 ## stack(string) = null
 Name of stack. On the same category axis, the series with the same `stack` name would be put on top of each other.
 
+## groupOrder(string) = null
+{{ use: partial-version(version = "5.1.0") }}
+When multiple series are configured on the same category axis, cluster and stacked intra group sorting are supported. The optional parameters are 'ASC' (ascending) and 'desc' (descending).
+
 {{ use: partial-cursor }}
 
 {{use: partial-barGrid(
diff --git a/zh/option/series/bar.md b/zh/option/series/bar.md
index cd7a84aa5..38c8c870b 100644
--- a/zh/option/series/bar.md
+++ b/zh/option/series/bar.md
@@ -170,6 +170,10 @@ option = {
 ## stack(string) = null
 数据堆叠，同个类目轴上系列配置相同的`stack`值可以堆叠放置。
 
+## groupOrder(string) = null
+{{ use: partial-version(version = "5.1.0") }}
+同个类目轴上配置多个series时，支持簇状、堆叠组内排序，可选参数为'asc'(升序)、'desc'(降序)。
+
 {{ use: partial-cursor }}
 
 {{use: partial-barGrid(