diff --git a/.vscode/c_cpp_properties.json b/.vscode/c_cpp_properties.json
index df653dd..5687ab4 100644
--- a/.vscode/c_cpp_properties.json
+++ b/.vscode/c_cpp_properties.json
@@ -12,6 +12,13 @@
             "cStandard": "c17",
             "cppStandard": "gnu++17",
             "intelliSenseMode": "linux-gcc-x64"
+        },
+        {
+            "name": "Win32",
+            "includePath": [
+                "${workspaceFolder}/**",
+                "E:/Projects/Libraries/boost_1_86_0_msvc2022_64bit/include/boost-1_86"
+            ]
         }
     ],
     "version": 4
diff --git a/Nng/Buffer.cpp b/Nng/Buffer.cpp
index 034bdbc..0ef4d54 100644
--- a/Nng/Buffer.cpp
+++ b/Nng/Buffer.cpp
@@ -47,4 +47,9 @@ void *Buffer::release() {
     m_size = 0;
     return m_buffer;
 }
+
+std::string_view Buffer::data() const noexcept {
+    return std::string_view{reinterpret_cast<const char *>(m_buffer), m_size};
+}
+
 } // namespace Nng
diff --git a/Nng/Buffer.h b/Nng/Buffer.h
index c7b46b1..9b957d4 100644
--- a/Nng/Buffer.h
+++ b/Nng/Buffer.h
@@ -2,6 +2,7 @@
 #define __BUFFER_H__
 
 #include <cstdint>
+#include <string_view>
 
 namespace Nng {
 
@@ -37,6 +38,8 @@ public:
         return reinterpret_cast<T *>(m_buffer);
     }
 
+    std::string_view data() const noexcept;
+
     std::size_t size() const noexcept {
         return m_size;
     }
diff --git a/Universal/IoContext.cpp b/Universal/IoContext.cpp
index f37663f..0633d36 100644
--- a/Universal/IoContext.cpp
+++ b/Universal/IoContext.cpp
@@ -3,23 +3,43 @@
 #include <boost/scope_exit.hpp>
 #include <boost/stacktrace.hpp>
 
+IoContext::IoContext(int concurrency_hint)
+    : m_concurrency(concurrency_hint), m_ioContext(std::make_shared<boost::asio::io_context>(concurrency_hint)) {
+}
+
 IoContext::~IoContext() {
     stop();
 }
 
 void IoContext::stop() {
+    m_guarder.reset();
     m_ioContext->stop();
-    if (m_thread.joinable()) m_thread.join();
+    if (!m_asynchronous) {
+        for (auto &thread : m_threads) {
+            if (thread.joinable()) thread.join();
+        }
+        m_threads.clear();
+    }
+}
+
+void IoContext::run(bool asynchronous) {
+    using namespace boost::asio;
+    if (m_concurrency < 1) m_concurrency = 1;
+    m_asynchronous = asynchronous;
+    for (int i = 0; i < m_concurrency; i++) {
+        m_threads.push_back(std::thread(&IoContext::runIoContext, this));
+    }
+    m_guarder = std::make_unique<executor_work_guard<io_context::executor_type>>(m_ioContext->get_executor());
+    if (asynchronous) {
+        for (auto &thread : m_threads) {
+            if (thread.joinable()) thread.join();
+        }
+        m_threads.clear();
+    }
 }
 
 void IoContext::runIoContext() {
-    LOG(info) << "asio context started ...";
-    BOOST_SCOPE_EXIT(void) {
-        LOG(info) << "asio context exited ...";
-    }
-    BOOST_SCOPE_EXIT_END
     try {
-        boost::asio::executor_work_guard<boost::asio::io_context::executor_type> work(m_ioContext->get_executor());
         m_ioContext->run();
     } catch (const boost::log::system_error &error) {
         LOG(error) << error.what();
diff --git a/Universal/IoContext.h b/Universal/IoContext.h
index bc53a2f..aaa579d 100644
--- a/Universal/IoContext.h
+++ b/Universal/IoContext.h
@@ -9,28 +9,17 @@
 
 class IoContext {
 public:
-    enum class Mode {
-        Synchronous,
-        Asynchronous,
-    };
     friend class Amass::Singleton<IoContext, Amass::LocalInstance>;
     std::shared_ptr<boost::asio::io_context> ioContext() const {
         return m_ioContext;
     }
-    template <Mode mode = Mode::Asynchronous>
-    void run() {
-        if constexpr (mode == Mode::Asynchronous) {
-            m_thread = std::thread(&IoContext::runIoContext, this);
-        } else {
-            runIoContext();
-        }
-    }
+    void run(bool asynchronous = true) ;
     void stop();
     ~IoContext();
 
     /**
-     * @brief 
-     * 
+     * @brief
+     *
      * @tparam Executor boost::asio::io_context、boost::asio::strand(通过 boost::asio::make_strand(io_context); 得到)
      */
     template <class Executor, class Func, class Rep, class Period>
@@ -47,14 +36,15 @@ public:
     }
 
 protected:
-    template <typename... Args>
-    IoContext(Args &&...args) : m_ioContext(std::make_shared<boost::asio::io_context>(std::forward<Args>(args)...)) {
-    }
+    IoContext(int concurrency);
     void runIoContext();
 
 private:
-    std::thread m_thread;
+    int m_concurrency = 1;
     std::shared_ptr<boost::asio::io_context> m_ioContext;
+    std::unique_ptr<boost::asio::executor_work_guard<boost::asio::io_context::executor_type>> m_guarder;
+    std::vector<std::thread> m_threads;
+    bool m_asynchronous=false;
 };
 
 #endif // IOCONTEXT_H