diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..fe861fb
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,28 @@
+cmake_minimum_required(VERSION 3.1.0)
+project(Graph)
+
+# # Debug(GDB)
+# SET(CMAKE_BUILD_TYPE "Debug")
+# SET(CMAKE_CXX_FLAGS_DEBUG "ENV{CXXFLAGS} -O0 -Wall -g2 -ggdb")
+# SET(CMAKE_CXX_FLAGS_RELEASE "ENV{CXXFLAGS} -O3 -Wall")
+
+# Collect file
+aux_source_directory(./src SRC)
+include_directories(./include)
+
+set(LIBRARY_OUTPUT_PATH ${PROJECT_BINARY_DIR}/bin)
+set(EXECUTABLE_OUTPUT_PATH ${PROJECT_BINARY_DIR}/bin)
+
+# Generate lib
+add_library(Graph SHARED ${SRC})
+
+# Header file
+target_include_directories(Graph 
+PUBLIC 
+./include)
+
+# Compile
+add_executable(Main main.cpp)
+
+# Link
+target_link_libraries(Main Graph)
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diff --git a/Introduction.md b/Introduction.md
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--- /dev/null
+++ b/Introduction.md
@@ -0,0 +1,20 @@
+# Introduction
+This project contains a shared library(`libGraph.dll`) of Graph and related algorithms. The `Main.exe` is a demo.
+
+# Graph
+Default is **Direcrted  Network**. Contains both directions and weights. You can set the weight to a constant number and connect 2 vertex with 2 contary direction edge to simplify it.
+
+## Initial
+Graph contains too much information and is hard to initial by typing on keyboard. So please create a `Initial.txt` file in this
+form:
+
+```txt
+A B C D E F *
+A 12 E
+A 1 B
+C 1 A
+E 2 F
+```
+1, First line is the vertecis data, using a '*' character as end label.
+
+2, Following are the edges. Each line indicates an edge, left to right are tail vertex, weight, head vertex.
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diff --git a/include/Alias.h b/include/Alias.h
new file mode 100644
index 0000000..2895e39
--- /dev/null
+++ b/include/Alias.h
@@ -0,0 +1,10 @@
+#ifndef __ALIAS_H__
+#define __ALIAS_H__
+
+struct Alias
+{
+    using size_t = unsigned int;
+};
+
+
+#endif
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diff --git a/include/Edge.h b/include/Edge.h
new file mode 100644
index 0000000..34f1d7c
--- /dev/null
+++ b/include/Edge.h
@@ -0,0 +1,33 @@
+#ifndef __EDGE_H__
+#define __EDGE_H__
+#include "Alias.h"
+#include "Graph.h"
+
+// Directed edge, and has weight
+class Edge : public Alias
+{
+    friend class Graph;
+private:
+    // The vertex that the edge comes from.
+    size_t tailVtx;
+
+    // The vertex that the edge comes to.
+    size_t headVtx;
+
+    Edge* headList;
+    Edge* tailList;
+
+    double weight;
+
+public:
+    Edge(size_t Head_Vertex, size_t Tail_Vertex, Edge* Head_List=nullptr, Edge* Tail_list=nullptr);
+    ~Edge();
+};
+
+Edge ::Edge(size_t Head_Vertex, size_t Tail_Vertex, Edge* Head_List, Edge* Tail_list)
+:headList(Head_List), tailList(Tail_list), headVtx(Head_Vertex), tailVtx(Tail_Vertex)
+{}
+
+Edge ::~Edge()
+{}
+#endif
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diff --git a/include/Graph.h b/include/Graph.h
new file mode 100644
index 0000000..15a9c46
--- /dev/null
+++ b/include/Graph.h
@@ -0,0 +1,24 @@
+#ifndef __GRAPH_H__
+#define __GRAPH_H__
+#include "Edge.h"
+#include "Vertex.h"
+#include "Alias.h"
+#include <vector>
+#include <iostream>
+#include <string>
+
+const std::string Path{"./../../rsrc/"};
+
+// Using Orthogonal list
+class Graph : public Alias
+{
+    friend class Vertex;
+    friend class Edge;
+private:
+    std::vector<Vertex> vertexList;
+
+public:
+    Graph(std::istream& input);
+    ~Graph();
+};
+#endif
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diff --git a/include/Vertex.h b/include/Vertex.h
new file mode 100644
index 0000000..fba971b
--- /dev/null
+++ b/include/Vertex.h
@@ -0,0 +1,33 @@
+#ifndef __VERTEX_H__
+#define __VERTEX_H__
+#include "Edge.h"
+#include "Alias.h"
+#include "Graph.h"
+
+// Basic element of graph
+class Vertex: public Alias
+{
+    friend class Graph;
+    friend bool operator==(const Vertex& a, const Vertex& b);
+private:
+    char data;
+    Edge * firstIn, *firstOut;
+
+public:
+    Vertex(char Data, Edge * First_In = nullptr, Edge * First_Out = nullptr);
+    Vertex();
+    ~Vertex();
+};
+// Support function 'std::find' work.
+inline bool operator==(const Vertex& a, const Vertex& b){ return a.data == b.data; }
+
+Vertex ::Vertex(char Data, Edge * First_In, Edge * First_Out)
+:data(Data), firstIn(First_In), firstOut(First_Out)
+{}
+
+Vertex ::Vertex()
+:data(), firstIn(nullptr), firstOut(nullptr){}
+
+Vertex ::~Vertex()
+{}
+#endif
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diff --git a/main.cpp b/main.cpp
new file mode 100644
index 0000000..2a3e643
--- /dev/null
+++ b/main.cpp
@@ -0,0 +1,10 @@
+#include "Graph.h"
+#include <iostream>
+#include <fstream>
+// Demo
+
+int main(){
+    std::ifstream in(Path + "Initial.txt");
+    Graph g(in);
+    return 0;
+}
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diff --git a/rsrc/Initial.txt b/rsrc/Initial.txt
new file mode 100644
index 0000000..a4b91ab
--- /dev/null
+++ b/rsrc/Initial.txt
@@ -0,0 +1,14 @@
+A B C D E F G H *
+A 1 B
+B 2 C
+C 3 A
+C 1 D
+D 4 E
+E 3 F
+F 10 G
+G 11 H
+H 1 A
+A 1 E
+A 2 G
+B 19 G
+B 2 D
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diff --git a/src/Graph.cpp b/src/Graph.cpp
new file mode 100644
index 0000000..e3dbee2
--- /dev/null
+++ b/src/Graph.cpp
@@ -0,0 +1,93 @@
+#include "Graph.h"
+#include <string>
+#include <iterator>
+#include <algorithm>
+using std::string;
+using std::vector;
+using std::cout;
+using std::endl;
+
+Graph::Graph(std::istream& input)
+{
+    char buffer;
+
+    // Get Vertex data
+    while(input >> buffer && buffer != '*'){
+        vertexList.push_back(Vertex(buffer));
+    }
+    // Get edges and connect
+    typedef vector<Vertex>::iterator Iter;
+    Iter tail, head;
+    size_t weight;
+
+    while (!input.eof())
+    {
+        // Get edges information
+        input >> buffer;
+        tail = std::find(vertexList.begin(), vertexList.end(), Vertex(buffer));
+
+        input >> weight;
+
+        input >> buffer;
+        head = std::find(vertexList.begin(), vertexList.end(), Vertex(buffer));
+
+        // Add to list
+        // Link adjacent list
+        auto  tailList_tail{(*tail).firstOut};
+        auto NewEdge{new Edge(head - vertexList.begin(), tail - vertexList.begin())};
+        if(tailList_tail){
+            while(tailList_tail->tailList){
+                 tailList_tail = tailList_tail->tailList;
+            }
+            tailList_tail->tailList = NewEdge;
+        }else{
+            (*tail).firstOut = NewEdge;
+        }
+
+        // Link de-adjacent list
+        auto headList_tail{(*head).firstIn};
+        if(headList_tail){
+            while(headList_tail->headList){
+                headList_tail = headList_tail->headList;
+            }
+            headList_tail->headList = NewEdge;
+        }else{
+            (*head).firstIn = NewEdge;
+        }
+    }
+    
+    // Test
+    // cout << "Vertex" << "\t" << "Tail" << "\t" << "Head" << endl;
+    for(auto& i : vertexList){
+        cout << i.data << "\t";
+
+        auto ptr{i.firstIn};
+        while (ptr){
+            cout << ptr->headVtx << ' ' << ptr->tailVtx << '\t';
+            ptr = ptr->tailList;
+        }
+        cout << endl;
+    }
+}
+
+Graph::~Graph()
+{
+    for(auto& vtx : vertexList){
+        // cout<<"Delete: ";
+        if(!vtx.firstOut) continue;
+        if(!vtx.firstOut->tailList){
+            // cout << vtx.firstOut->headVtx <<' '<< vtx.firstOut->tailVtx << '\t';
+            delete vtx.firstOut;
+        }else {
+            auto back{vtx.firstOut}, prior{back->tailList}; 
+            while(prior){
+                // cout << back->headVtx << ' ' << back->tailVtx << '\t';
+                delete back;
+                back = prior;
+                prior = prior->tailList;
+            }
+            // cout<< back->headVtx << ' ' << back->tailVtx << endl;
+            delete back;
+        }
+    }
+}
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