diff --git a/docs-2.0-zh/3.ngql-guide/5.operators/6.set.md b/docs-2.0-zh/3.ngql-guide/5.operators/6.set.md
index 57f5b6299f5..3308b64bb43 100644
--- a/docs-2.0-zh/3.ngql-guide/5.operators/6.set.md
+++ b/docs-2.0-zh/3.ngql-guide/5.operators/6.set.md
@@ -35,6 +35,7 @@ nebula> GO FROM "player102" OVER follow YIELD dst(edge) \
 | "player125" |
 +-------------+
 
+# 查询 Tag 为 player 的点，根据名称排序后获取前 3 条数据，并与数组合并返回，不包含重复的元素。
 nebula> MATCH (v:player) \
         WITH v.player.name AS n \
         RETURN n ORDER BY n LIMIT 3 \
@@ -63,6 +64,7 @@ nebula> GO FROM "player102" OVER follow YIELD dst(edge) \
 | "player125" |
 +-------------+
 
+# 查询 Tag 为 player 的点，根据名称排序后获取前 3 条数据，并与数组合并返回，包含重复的元素。
 nebula> MATCH (v:player) \
         WITH v.player.name AS n \
         RETURN n ORDER BY n LIMIT 3 \
@@ -120,6 +122,7 @@ nebula> GO FROM "player102" OVER follow \
 +----+--------+-----+
 +----+--------+-----+
 
+# 返回 player102 的邻居和边数据与 player100 的邻居和边数据之间的交集。
 nebula> MATCH (v:player)-[e:follow]->(v2) \
         WHERE id(v) == "player102" \
         RETURN id(v2) As id, e.degree As Degree, v2.player.age AS Age \
@@ -132,6 +135,7 @@ nebula> MATCH (v:player)-[e:follow]->(v2) \
 +----+--------+-----+
 +----+--------+-----+
 
+# 返回 [1,2] 与 [1,2,3,4] 的交集。
 nebula> UNWIND [1,2] AS a RETURN a \
         INTERSECT \
         UNWIND [1,2,3,4] AS a \
@@ -165,6 +169,7 @@ nebula> GO FROM "player100" OVER follow YIELD dst(edge) \
 | "player125" |
 +-------------+
 
+# 返回在 player102 的邻居中，但不在 player100 的邻居中的元素。
 nebula> GO FROM "player102" OVER follow YIELD dst(edge) AS id \
         MINUS \
         GO FROM "player100" OVER follow YIELD dst(edge) AS id;
@@ -174,6 +179,7 @@ nebula> GO FROM "player102" OVER follow YIELD dst(edge) AS id \
 | "player100" |
 +-------------+
 
+# 返回在 player102 的邻居中，但不在 player100 的邻居中的元素。
 nebula> MATCH (v:player)-[e:follow]->(v2) \
         WHERE id(v) =="player102" \
         RETURN id(v2) AS id\
@@ -187,6 +193,7 @@ nebula> MATCH (v:player)-[e:follow]->(v2) \
 | "player100" |
 +-------------+
 
+# 返回 [1,2,3] 中不与 4 相同的元素。
 nebula> UNWIND [1,2,3] AS a RETURN a \
         MINUS \
         WITH 4 AS a \