diff --git a/src/DialogHelper.cpp b/src/DialogHelper.cpp
index 79f3969..7c37bc0 100644
--- a/src/DialogHelper.cpp
+++ b/src/DialogHelper.cpp
@@ -61,7 +61,7 @@ namespace YYCC::DialogHelper {
 		if (modes.empty()) return false;
 
 		// add into pairs and return
-		m_Filters.emplace_back(std::make_pair(name, modes));
+		m_Filters.emplace_back(std::make_pair(std::move(name), std::move(modes)));
 		return true;
 	}
 
diff --git a/src/ExceptionHelper.cpp b/src/ExceptionHelper.cpp
index b5f279f..e92ff7f 100644
--- a/src/ExceptionHelper.cpp
+++ b/src/ExceptionHelper.cpp
@@ -28,7 +28,7 @@ namespace YYCC::ExceptionHelper {
 	*/
 	LPTOP_LEVEL_EXCEPTION_FILTER g_ProcBackup;
 
-#pragma region Exception Handler Detail
+#pragma region Exception Handler Implementation
 
 	static HMODULE GetCurrentModule() {
 		// Reference: https://stackoverflow.com/questions/557081/how-do-i-get-the-hmodule-for-the-currently-executing-code
diff --git a/src/IOHelper.cpp b/src/IOHelper.cpp
index 0fae29d..d6fd32d 100644
--- a/src/IOHelper.cpp
+++ b/src/IOHelper.cpp
@@ -6,19 +6,29 @@
 #include <iostream>
 #include <string>
 
+#include "WinImportPrefix.hpp"
+#include <Windows.h>
+#include <io.h>
+#include <fcntl.h>
+#include "WinImportSuffix.hpp"
+
 namespace YYCC::IOHelper {
 
-	FILE* FOpen(const char* u8_filepath, const char* u8_mode) {
-		std::wstring wmode, wpath;
-		bool suc = YYCC::EncodingHelper::CharToWchar(u8_mode, wmode, CP_UTF8);
-		suc = suc && YYCC::EncodingHelper::CharToWchar(u8_filepath, wpath, CP_UTF8);
+	bool futf8(FILE* fs) {
+		// https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/setmode?view=msvc-170
+		return _setmode(_fileno(fs), _O_U8TEXT) != -1;
+	}
 
-		if (suc) {
-			return _wfopen(wpath.c_str(), wmode.c_str());
-		} else {
-			// fallback
-			return std::fopen(u8_filepath, u8_mode);
-		}
+	FILE* fopen(const char* u8_filepath, const char* u8_mode) {
+		// convert mode and file path to wchar
+		std::wstring wmode, wpath;
+		if (!YYCC::EncodingHelper::UTF8ToWchar(u8_mode, wmode))
+			return nullptr;
+		if (!YYCC::EncodingHelper::UTF8ToWchar(u8_filepath, wpath))
+			return nullptr;
+
+		// call microsoft specified fopen which support wchar as argument.
+		return _wfopen(wpath.c_str(), wmode.c_str());
 	}
 
 }
diff --git a/src/IOHelper.hpp b/src/IOHelper.hpp
index d1803f5..888caca 100644
--- a/src/IOHelper.hpp
+++ b/src/IOHelper.hpp
@@ -5,8 +5,18 @@
 #include <cstdio>
 
 namespace YYCC::IOHelper {
+	
+	/**
+	 * @brief Set given FILE* as UTF8 mode.
+	 * @param fs[in] The FILE* need to be set as UTF8 mode.
+	 * @return True if success, otherwise false.
+	 * @warning Once this function success, you can not use any narrow char function on this FILE*,
+	 * such as std::fputs, std::fprintf and etc. You only can use wide char function on it,
+	 * or use the functions provided in this namespace by providing UTF8 string as their argument.
+	*/
+	bool futf8(FILE* fs);
 
-	FILE* FOpen(const char* u8_filepath, const char* u8_mode);
+	FILE* fopen(const char* u8_filepath, const char* u8_mode);
 
 }
 
diff --git a/src/ParserHelper.hpp b/src/ParserHelper.hpp
index 74f4349..e9aff72 100644
--- a/src/ParserHelper.hpp
+++ b/src/ParserHelper.hpp
@@ -1,10 +1,84 @@
 #pragma once
+#include "YYCCInternal.hpp"
+
+#include "EncodingHelper.hpp"
 #include <string>
 #include <cinttypes>
+#include <type_traits>
+#include <stdexcept>
+#include <limits>
 
 namespace YYCC::ParserHelper {
 
-	bool Parse(const std::string& strl, int& ret, int base = 10);
-	int Parse(const std::string& strl, int base = 10);
+	template<class>
+	constexpr bool g_AlwaysFalse = false;
+
+	template<typename _Ty, std::enable_if_t<std::is_floating_point_v<_Ty>, int> = 0>
+	bool TryParse(const std::string& strl, _Ty& num) {
+		try {
+			// float types
+			if constexpr (std::is_same_v<_Ty, float>) {
+				num = std::stof(strl, nullptr);
+			} else if constexpr (std::is_same_v<_Ty, double>) {
+				num = std::stod(strl, nullptr);
+			} else if constexpr (std::is_same_v<_Ty, long double>) {
+				num = std::stold(strl, nullptr);
+			} else {
+				static_assert(g_AlwaysFalse<_Ty>, "Invalid float type.");
+			}
+			return true;
+		} catch (const std::invalid_argument&) {
+			return false;
+		} catch (const std::out_of_range&) {
+			return false;
+		}
+	}
+	template<typename _Ty, std::enable_if_t<std::is_integral_v<_Ty> && !std::is_same_v<_Ty, bool>, int> = 0>
+	bool TryParse(const std::string& strl, _Ty& num, int base = 10) {
+		try {
+			// integer type
+			// decide integer type
+			using container_t = std::conditional_t<std::is_unsigned_v<_Ty>, unsigned long long, long long>;
+			// parse it from string according to whether integer type is signed.
+			container_t cache;
+			if constexpr (std::is_unsigned_v<_Ty>) {
+				cache = std::stoull(strl, nullptr, base);
+			} else {
+				cache = std::stoll(strl, nullptr, base);
+			}
+			// check its range
+			if (cache < std::numeric_limits<_Ty>::min() || cache > std::numeric_limits<_Ty>::max())
+				return false;
+			num = static_cast<_Ty>(cache);
+			return true;
+		} catch (const std::invalid_argument&) {
+			return false;
+		} catch (const std::out_of_range&) {
+			return false;
+		}
+	}
+	bool TryParse(const std::string& strl, bool& num) {
+		if (strl == "true") num = true;
+		else if (strl == "false") num = false;
+		else return false;
+		return true;
+	}
+
+	template<typename _Ty, std::enable_if_t<std::is_arithmetic_v<_Ty>, int> = 0>
+	_Ty Parse(const std::string& strl) {
+		_Ty ret;
+		TryParse(strl, ret);
+		return ret;
+	}
+
+	template<typename _Ty, std::enable_if_t<std::is_arithmetic_v<_Ty>, int> = 0>
+	std::string ToString(_Ty num) {
+		return std::to_string(num);
+	}
+	template<>
+	std::string ToString<bool>(bool num) {
+		if (num) return std::string("true");
+		else return std::string("false");
+	}
 
 }
diff --git a/src/StringHelper.hpp b/src/StringHelper.hpp
index 32726c8..caebb91 100644
--- a/src/StringHelper.hpp
+++ b/src/StringHelper.hpp
@@ -1,4 +1,6 @@
 #pragma once
+#include "YYCCInternal.hpp"
+
 #include <string>
 #include <cstdarg>
 #include <functional>
diff --git a/src/TerminalHelper.cpp b/src/TerminalHelper.cpp
index c4d4536..3b3a757 100644
--- a/src/TerminalHelper.cpp
+++ b/src/TerminalHelper.cpp
@@ -31,7 +31,7 @@ namespace YYCC::TerminalHelper {
 		if (!SetConsoleOutputCP(CP_UTF8)) return false;
 
 		/*_setmode(_fileno(stdout), _O_U8TEXT);*/
-		int _ = _setmode(_fileno(fs), _O_U16TEXT);
+		int _ = _setmode(_fileno(fs), _O_U8TEXT);
 		return true;
 	}
 
diff --git a/src/YYCCommonplace.hpp b/src/YYCCommonplace.hpp
index 4e2b8f7..21180fa 100644
--- a/src/YYCCommonplace.hpp
+++ b/src/YYCCommonplace.hpp
@@ -6,3 +6,4 @@
 #include "EncodingHelper.hpp"
 #include "TerminalHelper.hpp"
 #include "DialogHelper.hpp"
+#include "ParserHelper.hpp"
diff --git a/testbench/main.cpp b/testbench/main.cpp
index 7cebd92..e0d7e8b 100644
--- a/testbench/main.cpp
+++ b/testbench/main.cpp
@@ -52,6 +52,32 @@ namespace Testbench {
 
 	}
 
+	static void ParserTestbench() {
+
+#define TEST_MACRO(type_t, value, string_value) { \
+	type_t cache = value; \
+	std::string ret(YYCC::ParserHelper::ToString<type_t>(cache)); \
+	Assert(ret == string_value, "YYCC::StringHelper::ToString<" #type_t ">"); \
+}
+
+		TEST_MACRO(int8_t, INT8_C(-61), "-61");
+		TEST_MACRO(uint8_t, UINT8_C(200), "200");
+		TEST_MACRO(int16_t, INT16_C(6161), "6161");
+		TEST_MACRO(uint16_t, UINT16_C(32800), "32800");
+		TEST_MACRO(int32_t, INT32_C(61616161), "61616161");
+		TEST_MACRO(uint32_t, UINT32_C(4294967293), "4294967293");
+		TEST_MACRO(int64_t, INT64_C(616161616161), "616161616161");
+		TEST_MACRO(uint64_t, UINT64_C(9223372036854775807), "9223372036854775807");
+		TEST_MACRO(bool, true, "true");
+		//{
+		//	bool cache = true;
+		//	std::string ret(YYCC::ParserHelper::ToString<bool>(cache));
+		//	Assert(ret == "true", "YYCC::StringHelper::ToString<bool>");
+		//}
+
+#undef TEST_MACRO
+	}
+
 	static void DialogTestbench() {
 		std::string ret;
 		std::vector<std::string> rets;
@@ -87,5 +113,6 @@ namespace Testbench {
 int main(int argc, char** args) {
 	Testbench::TerminalTestbench();
 	Testbench::StringTestbench();
-	Testbench::DialogTestbench();
+	Testbench::ParserTestbench();
+	//Testbench::DialogTestbench();
 }