diff --git a/demo/main.cpp b/demo/main.cpp
new file mode 100644
index 0000000..866bee0
--- /dev/null
+++ b/demo/main.cpp
@@ -0,0 +1,12 @@
+#include <iostream>
+#include "ovo.h"
+
+int main(int argc, char const *argv[])
+{
+	ovo::info i;
+
+	i.hi();
+	std::cout << i.version << std::endl;
+    i.detail();
+	return 0;
+}
diff --git a/demo/ovo.cpp b/demo/ovo.cpp
new file mode 100644
index 0000000..77bf458
--- /dev/null
+++ b/demo/ovo.cpp
@@ -0,0 +1,49 @@
+
+/**
+ * ovo Main File
+ *
+ * @category ovo
+ * @package ovo.cpp
+ * @copyright Copyright (c) 2019 EEENeko (https://github.com/eeeneko)
+ * @license GNU General Public License 2.0
+ * @version 0.0.1
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <io.h>
+#include <fstream>
+#include <string>
+#include <stdlib.h>
+#include <vector>
+#include <algorithm>
+#include <cstring>
+
+#include "ovo.h"
+
+
+/****** Class info ******/
+
+/**
+ * Display version
+ *
+ * @access public
+ */
+string ovo::info::version = "Version 0.0.1";
+
+/**
+ * Display a welcome string
+ *
+ * @access public
+ * @param void
+ * @return void
+ */
+void ovo::info::detail()
+{
+    cout << endl << "Lib Name: ovo" <<endl;
+    cout << "Org: EEENeko (https://github.com/eeeNeko)" << endl;
+    cout << "Author: Jianzhi Fan, Yimian Liu" << endl;
+    cout << "license GNU General Public License 2.0" << endl;
+    cout << "copyright Copyright (c) 2019 EEENeko" << endl << endl;
+}
+
diff --git a/demo/ovo.h b/demo/ovo.h
new file mode 100644
index 0000000..36fc2ee
--- /dev/null
+++ b/demo/ovo.h
@@ -0,0 +1,41 @@
+
+/**
+ * ovo Main File
+ *
+ * @category ovo
+ * @package ovo.cpp
+ * @copyright Copyright (c) 2019 EEENeko (https://github.com/eeeneko)
+ * @license GNU General Public License 2.0
+ * @version 0.0.1
+ */
+
+#ifndef _OVO_H
+#define _OVO_H
+
+#include <iostream>
+#include <string>
+#include <vector>
+
+using namespace std;
+
+
+namespace ovo{
+
+    /**
+    * Show info about ovo
+    *
+    * @author yimian
+    * @category ovo
+    * @package ovo
+    */
+    class info{
+
+        public:
+            static string version;
+            inline void hi(){cout << "Hello OvO~" << endl;};
+            void detail();
+    };
+}
+
+
+#endif
\ No newline at end of file
diff --git a/dist/ovo.cpp b/dist/ovo.cpp
new file mode 100644
index 0000000..77bf458
--- /dev/null
+++ b/dist/ovo.cpp
@@ -0,0 +1,49 @@
+
+/**
+ * ovo Main File
+ *
+ * @category ovo
+ * @package ovo.cpp
+ * @copyright Copyright (c) 2019 EEENeko (https://github.com/eeeneko)
+ * @license GNU General Public License 2.0
+ * @version 0.0.1
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <io.h>
+#include <fstream>
+#include <string>
+#include <stdlib.h>
+#include <vector>
+#include <algorithm>
+#include <cstring>
+
+#include "ovo.h"
+
+
+/****** Class info ******/
+
+/**
+ * Display version
+ *
+ * @access public
+ */
+string ovo::info::version = "Version 0.0.1";
+
+/**
+ * Display a welcome string
+ *
+ * @access public
+ * @param void
+ * @return void
+ */
+void ovo::info::detail()
+{
+    cout << endl << "Lib Name: ovo" <<endl;
+    cout << "Org: EEENeko (https://github.com/eeeNeko)" << endl;
+    cout << "Author: Jianzhi Fan, Yimian Liu" << endl;
+    cout << "license GNU General Public License 2.0" << endl;
+    cout << "copyright Copyright (c) 2019 EEENeko" << endl << endl;
+}
+
diff --git a/dist/ovo.h b/dist/ovo.h
new file mode 100644
index 0000000..36fc2ee
--- /dev/null
+++ b/dist/ovo.h
@@ -0,0 +1,41 @@
+
+/**
+ * ovo Main File
+ *
+ * @category ovo
+ * @package ovo.cpp
+ * @copyright Copyright (c) 2019 EEENeko (https://github.com/eeeneko)
+ * @license GNU General Public License 2.0
+ * @version 0.0.1
+ */
+
+#ifndef _OVO_H
+#define _OVO_H
+
+#include <iostream>
+#include <string>
+#include <vector>
+
+using namespace std;
+
+
+namespace ovo{
+
+    /**
+    * Show info about ovo
+    *
+    * @author yimian
+    * @category ovo
+    * @package ovo
+    */
+    class info{
+
+        public:
+            static string version;
+            inline void hi(){cout << "Hello OvO~" << endl;};
+            void detail();
+    };
+}
+
+
+#endif
\ No newline at end of file
diff --git a/docs/info/ovo_info.md b/docs/ovo_info/README.md
similarity index 100%
rename from docs/info/ovo_info.md
rename to docs/ovo_info/README.md
diff --git a/docs/ovo_string/README.md b/docs/ovo_string/README.md
new file mode 100644
index 0000000..9b57868
--- /dev/null
+++ b/docs/ovo_string/README.md
@@ -0,0 +1,2 @@
+## Class string
+### string.xxx
\ No newline at end of file
diff --git a/test/.gitignore b/test/.gitignore
new file mode 100644
index 0000000..adb36c8
--- /dev/null
+++ b/test/.gitignore
@@ -0,0 +1 @@
+*.exe
\ No newline at end of file