diff --git a/solution/1300-1399/1321.Restaurant Growth/README.md b/solution/1300-1399/1321.Restaurant Growth/README.md
index 1fe8b4e3532d4..174d70118f3b1 100644
--- a/solution/1300-1399/1321.Restaurant Growth/README.md	
+++ b/solution/1300-1399/1321.Restaurant Growth/README.md	
@@ -104,4 +104,18 @@ FROM t
 WHERE rk > 6;
 ```
 
+```sql
+# Write your MySQL query statement below
+SELECT
+    a.visited_on,
+    SUM(b.amount) AS amount,
+    ROUND(SUM(b.amount) / 7, 2) AS average_amount
+FROM
+    (SELECT DISTINCT visited_on FROM customer) AS a
+    JOIN customer AS b ON DATEDIFF(a.visited_on, b.visited_on) BETWEEN 0 AND 6
+WHERE a.visited_on >= (SELECT MIN(visited_on) FROM customer) + 6
+GROUP BY 1
+ORDER BY 1;
+```
+
 <!-- tabs:end -->
diff --git a/solution/1300-1399/1321.Restaurant Growth/README_EN.md b/solution/1300-1399/1321.Restaurant Growth/README_EN.md
index 5f60697e754ce..ab91dc98bd5f9 100644
--- a/solution/1300-1399/1321.Restaurant Growth/README_EN.md	
+++ b/solution/1300-1399/1321.Restaurant Growth/README_EN.md	
@@ -100,4 +100,18 @@ FROM t
 WHERE rk > 6;
 ```
 
+```sql
+# Write your MySQL query statement below
+SELECT
+    a.visited_on,
+    SUM(b.amount) AS amount,
+    ROUND(SUM(b.amount) / 7, 2) AS average_amount
+FROM
+    (SELECT DISTINCT visited_on FROM customer) AS a
+    JOIN customer AS b ON DATEDIFF(a.visited_on, b.visited_on) BETWEEN 0 AND 6
+WHERE a.visited_on >= (SELECT MIN(visited_on) FROM customer) + 6
+GROUP BY 1
+ORDER BY 1;
+```
+
 <!-- tabs:end -->