diff --git a/reference/best-practices/high-concurrency.md b/reference/best-practices/high-concurrency.md
index 6974c06e6129..c43dbcaf9b01 100644
--- a/reference/best-practices/high-concurrency.md
+++ b/reference/best-practices/high-concurrency.md
@@ -187,7 +187,7 @@ SPLIT TABLE TEST_HOTSPOT BETWEEN (0) AND (9223372036854775807) REGIONS 128;
 {{< copyable "sql" >}}
 
 ```sql
-create table t (a int, b int) shard_row_id_bits = 4 pre_split_regions=·3;
+create table t (a int, b int) shard_row_id_bits = 4 pre_split_regions=3;
 ```
 
 - `SHARD_ROW_ID_BITS = 4` 表示 tidb_rowid 的值会随机分布成 16 （16=2^4） 个范围区间。