diff --git a/hikyuu/data/mysql_upgrade/0003.sql b/hikyuu/data/mysql_upgrade/0003.sql
new file mode 100644
index 00000000..1095e5a0
--- /dev/null
+++ b/hikyuu/data/mysql_upgrade/0003.sql
@@ -0,0 +1,9 @@
+ALTER TABLE `hku_base`.`market` ADD `openTime1` INT(10) UNSIGNED NULL DEFAULT NULL;
+ALTER TABLE `hku_base`.`market` ADD `closeTime1` INT(10) UNSIGNED NULL DEFAULT NULL;
+ALTER TABLE `hku_base`.`market` ADD `openTime2` INT(10) UNSIGNED NULL DEFAULT NULL;
+ALTER TABLE `hku_base`.`market` ADD `closeTime2` INT(10) UNSIGNED NULL DEFAULT NULL;
+
+UPDATE `hku_base`.`market` SET `openTime1`=930, `closeTime1`=1130, `openTime2`=1300, `closeTime2`=1500 WHERE `marketid`=1;
+UPDATE `hku_base`.`market` SET `openTime1`=930, `closeTime1`=1130, `openTime2`=1300, `closeTime2`=1500 WHERE `marketid`=2;
+
+UPDATE `hku_base`.`version` set `version` = 3;
\ No newline at end of file
diff --git a/hikyuu/data/sqlite_upgrade/0004.sql b/hikyuu/data/sqlite_upgrade/0004.sql
new file mode 100644
index 00000000..30106d19
--- /dev/null
+++ b/hikyuu/data/sqlite_upgrade/0004.sql
@@ -0,0 +1,11 @@
+BEGIN TRANSACTION;
+ALTER TABLE `Market` ADD `openTime1` INTEGER;
+ALTER TABLE `Market` ADD `closeTime1` INTEGER;
+ALTER TABLE `Market` ADD `openTime2` INTEGER;
+ALTER TABLE `Market` ADD `closeTime2` INTEGER;
+
+UPDATE `Market` SET `openTime1`=930, `closeTime1`=1130, `openTime2`=1300, `closeTime2`=1500 WHERE `marketid`=1;
+UPDATE `Market` SET `openTime1`=930, `closeTime1`=1130, `openTime2`=1300, `closeTime2`=1500 WHERE `marketid`=2;
+
+UPDATE `version` set `version` = 4;
+COMMIT;
diff --git a/hikyuu_cpp/hikyuu/MarketInfo.cpp b/hikyuu_cpp/hikyuu/MarketInfo.cpp
index aca04cbe..624a50aa 100644
--- a/hikyuu_cpp/hikyuu/MarketInfo.cpp
+++ b/hikyuu_cpp/hikyuu/MarketInfo.cpp
@@ -31,7 +31,8 @@ string MarketInfo::toString() const {
 
     string split(", ");
     os << "MarketInfo(" << m_market << split << m_name << split << m_description << split << m_code
-       << split << m_lastDate << ")";
+       << split << m_lastDate << split << m_openTime1.minutes() << split << m_closeTime1.minutes()
+       << split << m_openTime2.minutes() << split << m_closeTime2.minutes() << ")";
     return os.str();
 }
 
diff --git a/hikyuu_cpp/hikyuu/MarketInfo.h b/hikyuu_cpp/hikyuu/MarketInfo.h
index c8ccecaf..a14ead05 100644
--- a/hikyuu_cpp/hikyuu/MarketInfo.h
+++ b/hikyuu_cpp/hikyuu/MarketInfo.h
@@ -57,15 +57,39 @@ public:
         return m_lastDate;
     }
 
+    /** 开市时间1 */
+    TimeDelta openTime1() const {
+        return m_openTime1;
+    }
+
+    /** 闭市时间1 */
+    TimeDelta closeTime1() const {
+        return m_closeTime1;
+    }
+
+    /** 开市时间2 */
+    TimeDelta openTime2() const {
+        return m_openTime2;
+    }
+
+    /** 闭市时间2 */
+    TimeDelta closeTime2() const {
+        return m_closeTime2;
+    }
+
     /** 仅用于python的__str__ */
     string toString() const;
 
 private:
-    string m_market;       //市场标识
-    string m_name;         //市场名称
-    string m_description;  //描述信息
-    string m_code;         //市场对应的指数代码，用于获取交易日历
-    Datetime m_lastDate;   //当前市场最后日期
+    string m_market;         // 市场标识
+    string m_name;           // 市场名称
+    string m_description;    // 描述信息
+    string m_code;           // 市场对应的指数代码，用于获取交易日历
+    Datetime m_lastDate;     // 当前市场最后日期
+    TimeDelta m_openTime1;   // 上午开市时间
+    TimeDelta m_closeTime1;  // 上午闭市时间
+    TimeDelta m_openTime2;   // 下午开市时间
+    TimeDelta m_closeTime2;  // 下午闭市时间
 };
 
 /**
diff --git a/hikyuu_cpp/hikyuu/Stock.cpp b/hikyuu_cpp/hikyuu/Stock.cpp
index 492ebf06..bfccc4d9 100644
--- a/hikyuu_cpp/hikyuu/Stock.cpp
+++ b/hikyuu_cpp/hikyuu/Stock.cpp
@@ -525,6 +525,20 @@ bool Stock::_getIndexRangeByDateFromBuffer(const KQuery& query, size_t& out_star
     return true;
 }
 
+void Stock::_loadNewKRecordToBuffer(const KQuery& query) {
+    if (!m_data || m_data->pKData.find(query.kType()) == m_data->pKData.end()) {
+        return;
+    }
+
+    KQuery::KType ktype = query.kType();
+    KRecordList& buffer = *(m_data->pKData[ktype]);
+    if (buffer.empty()) {
+        return;
+    }
+
+    // auto& lastRecord = buffer.back();
+}
+
 KRecord Stock::getKRecord(size_t pos, KQuery::KType kType) const {
     if (!m_data)
         return Null<KRecord>();
diff --git a/hikyuu_cpp/hikyuu/Stock.h b/hikyuu_cpp/hikyuu/Stock.h
index d7648cf1..bd780cb6 100644
--- a/hikyuu_cpp/hikyuu/Stock.h
+++ b/hikyuu_cpp/hikyuu/Stock.h
@@ -203,6 +203,8 @@ private:
     bool _getIndexRangeByIndex(const KQuery&, size_t& out_start, size_t& out_end) const;
     bool _getIndexRangeByDateFromBuffer(const KQuery&, size_t&, size_t&) const;
 
+    void _loadNewKRecordToBuffer(const KQuery&);
+
 private:
     struct HKU_API Data;
     shared_ptr<Data> m_data;
diff --git a/hikyuu_cpp/hikyuu/serialization/MarketInfo_serialization.h b/hikyuu_cpp/hikyuu/serialization/MarketInfo_serialization.h
index 41a11200..1124f41c 100644
--- a/hikyuu_cpp/hikyuu/serialization/MarketInfo_serialization.h
+++ b/hikyuu_cpp/hikyuu/serialization/MarketInfo_serialization.h
@@ -17,6 +17,7 @@
 #include <boost/serialization/nvp.hpp>
 #include <boost/serialization/split_free.hpp>
 #include <boost/serialization/vector.hpp>
+#include "TimeDelta_serialization.h"
 
 namespace boost {
 namespace serialization {