diff --git a/langguanApi.xml b/langguanApi.xml
index 34a1e25..66a2272 100644
--- a/langguanApi.xml
+++ b/langguanApi.xml
@@ -2878,6 +2878,13 @@
             <param name="exp"></param>
             <returns></returns>
         </member>
+        <member name="M:langguanApi.Service.BaseService`1.GetGroupedResultsAsync(MongoDB.Bson.BsonDocument[])">
+            <summary>
+            聚合查询
+            </summary>
+            <param name="pipeline"></param>
+            <returns></returns>
+        </member>
         <member name="M:langguanApi.Service.DetectionService.GetIndexData(System.Int32)">
             <summary>
             //获取最新的数据
diff --git a/langguanApi/Service/BaseService.cs b/langguanApi/Service/BaseService.cs
index 3163ffc..39a68bb 100644
--- a/langguanApi/Service/BaseService.cs
+++ b/langguanApi/Service/BaseService.cs
@@ -252,5 +252,14 @@ namespace langguanApi.Service
                 .Skip(req.pageSize * (req.current - 1)).Take(req.pageSize).ToList();
             return new Tuple<long, List<T>>(total, items);
         }
+        /// <summary>
+        /// 聚合查询
+        /// </summary>
+        /// <param name="pipeline"></param>
+        /// <returns></returns>
+        public async Task<List<BsonDocument>> GetGroupedResultsAsync(BsonDocument[] pipeline)
+        {
+            return await _collection.Aggregate<BsonDocument>(pipeline).ToListAsync();
+        }
     }
 }
diff --git a/langguanApi/Service/Hj212Service.cs b/langguanApi/Service/Hj212Service.cs
index e47a4bb..a1d56ae 100644
--- a/langguanApi/Service/Hj212Service.cs
+++ b/langguanApi/Service/Hj212Service.cs
@@ -25,23 +25,62 @@ namespace langguanApi.Service
         /// <returns></returns>
         public async Task<object> GetIndexData(int day = 7)
         {
-            Expression<Func<Model.HJ212, bool>> exp = filter => filter.CreateDateTime >= DateTime.Now.AddDays(-day);
-            var result = (await base.GetListWithExp(exp)).ToList();
-            var temp = result.Select(s => new
-            {
-                s.a34001,
-                s.a34002,
-                s.a34004,
-                date = s.CreateDateTime.AddHours(8).ToString("MM-dd")
-            }).ToList();
-            return temp.GroupBy(g => new { g.date })
-                    .Select(s => new
+            var now = DateTime.UtcNow;         // 获取当前时间（UTC）
+            var sevenDaysAgo = now.AddDays(-2); // 计算 7 天前的时间
+            var pipeline = new[]
+                       {
+                    new BsonDocument("$match", new BsonDocument
                     {
-                        s.Key.date,
-                        a34001 = Math.Round(s.Sum(t => t.a34001), 2),
-                        a34002 = Math.Round(s.Sum(t => t.a34002), 2),
-                        a34004 = Math.Round(s.Sum(t => t.a34004), 2)
-                    }).ToList();
+                        { "CreateDateTime", new BsonDocument { { "$gte", sevenDaysAgo }, { "$lt", now } } }
+                    }),
+                    new BsonDocument("$project", new BsonDocument
+                    {
+                        { "date", new BsonDocument("$dateToString", new BsonDocument { { "format", "%m-%d" }, { "date", "$CreateDateTime" } }) },
+                        { "a34001", 1 },
+                        { "a34002", 1 },
+                        { "a34004", 1 }
+                    }),
+                    new BsonDocument("$group", new BsonDocument
+                    {
+                        { "_id", "$date" },
+                        { "a34001", new BsonDocument("$sum", "$a34001") },
+                        { "a34002", new BsonDocument("$sum", "$a34002") },
+                        { "a34004", new BsonDocument("$sum", "$a34004") }
+                    }),
+                    new BsonDocument("$sort", new BsonDocument { { "_id", 1 } }) // 按日期排序
+                };
+
+            var temp = await base.GetGroupedResultsAsync(pipeline);
+            List<object> result = new List<object>();
+            foreach (var item in temp)
+            {
+                result.Add(new
+                {
+                    date = item["_id"].ToString(),
+                    a34001 = Math.Round(item["a34001"].ToDouble(), 2),
+                    a34002 = Math.Round(item["a34002"].ToDouble(), 2),
+                    a34004 = Math.Round(item["a34004"].ToDouble(), 2)
+                });
+            }
+            return result;
+            //var temp = result.Select(s => new
+            //{
+            //    s.a34001,
+            //    s.a34002,
+            //    s.a34004,
+            //    date = s.CreateDateTime.AddHours(8).ToString("MM-dd")
+            //}).ToList();
+            //return temp.GroupBy(g => new
+            //{
+            //    g.date
+            //})
+            //        .Select(s => new
+            //        {
+            //            s.Key.date,
+            //            a34001 = Math.Round(s.Sum(t => t.a34001), 2),
+            //            a34002 = Math.Round(s.Sum(t => t.a34002), 2),
+            //            a34004 = Math.Round(s.Sum(t => t.a34004), 2)
+            //        }).ToList();
 
 
             //temp.GroupBy(g => new { g.date }).ToList().ForEach(s =>
@@ -72,7 +111,7 @@ namespace langguanApi.Service
             Builders<Model.HJ212>.Filter.Eq(x => x.ST, 27),
             Builders<Model.HJ212>.Filter.Eq(x => x.CN, 2031)
         )
-    );
+        );
             var finalFilter = Builders<Model.HJ212>.Filter.And(dateFilter, conditionFilter);
             var result = await base.FindListyFilter(finalFilter);
             // 过滤掉voc设备
@@ -110,7 +149,7 @@ namespace langguanApi.Service
             Builders<Model.HJ212>.Filter.Eq(x => x.ST, 27),
             Builders<Model.HJ212>.Filter.Eq(x => x.CN, 2031)
         )
-    );
+        );
             // 组合过滤器（先按时间，再按其他条件）
             var finalFilter = Builders<Model.HJ212>.Filter.And(dateFilter, conditionFilter);
             var result = await base.FindListyFilter(finalFilter);