diff --git a/include/communicate/tcp_server.h b/include/communicate/tcp_server.h
new file mode 100644
index 0000000..7a25365
--- /dev/null
+++ b/include/communicate/tcp_server.h
@@ -0,0 +1,16 @@
+//
+// Created by 胡宇 on 2020/7/7.
+//
+
+#ifndef NET_TCP_SERVER_H
+#define NET_TCP_SERVER_H
+
+namespace Net {
+
+    class TCPServer {
+
+    };
+
+}
+
+#endif //NET_TCP_SERVER_H
diff --git a/include/type.h b/include/type.h
index 4f95d2f..7876a01 100644
--- a/include/type.h
+++ b/include/type.h
@@ -51,8 +51,6 @@
 #include <rapidjson/stringbuffer.h>
 #include <rapidjson/prettywriter.h>
 
-#include <SQLiteCpp/SQLiteCpp.h>
-
 
 using std::string;
 using std::vector;
diff --git a/include/utils/aes_cbc_encryptor.h b/include/utils/aes_cbc_encryptor.h
index 6777f88..8eb1a3b 100644
--- a/include/utils/aes_cbc_encryptor.h
+++ b/include/utils/aes_cbc_encryptor.h
@@ -19,14 +19,9 @@ namespace Net {
     class AESCBCEncryptor {
     public:
 
-        AESCBCEncryptor() {
-            generate_random_key_data();
-            aes_init(key_data);
-        }
+        AESCBCEncryptor();
 
-        string getKeyData() const{
-            return key_data;
-        }
+        string getKeyData() const;
 
         void encrypt(const std::string &data, std::string &encrypted_data);
 
@@ -34,7 +29,9 @@ namespace Net {
 
     private:
         const int nrounds = 8;
+
         uint8_t key[32], iv[32];
+
         EVP_CIPHER_CTX *e_ctx = EVP_CIPHER_CTX_new();
 
         std::string key_data;
diff --git a/include/utils/sha256_generator.h b/include/utils/sha256_generator.h
index bbaf89f..ac988c0 100644
--- a/include/utils/sha256_generator.h
+++ b/include/utils/sha256_generator.h
@@ -9,32 +9,28 @@ using std::string;
 using std::ifstream;
 using std::stringstream;
 
+namespace Net {
+
 /**
  * The Generator of SHA256 Hex
  * We can use it in an easy way.
  */
-class SHA256Generator{
-public:
-    SHA256Generator(string data){
-        this->raw_data = std::move(data);
-    }
+    class SHA256Generator {
+    public:
+        SHA256Generator(string data);
 
-    SHA256Generator(ifstream stream){
-        while(stream.good()){
-            stream >> raw_data;
-        }
-        stream.close();
-    }
+        SHA256Generator(ifstream stream);
 
-    void generate();
+        void replace(string &str);
 
-    string getHex(){
-        if(!if_generate) generate();
-        return this->sha256_data;
-    }
+        void generate();
 
-private:
-    bool if_generate = false;
-    string raw_data;
-    string sha256_data;
-};
+        string getHex();
+
+    private:
+        bool if_generate = false;
+        string raw_data;
+        string sha256_data;
+    };
+
+}
\ No newline at end of file
diff --git a/src/communicate/CMakeLists.txt b/src/communicate/CMakeLists.txt
new file mode 100644
index 0000000..78a9530
--- /dev/null
+++ b/src/communicate/CMakeLists.txt
@@ -0,0 +1,5 @@
+file(GLOB commuSrc *.cpp)
+
+add_library(commu STATIC ${commuSrc})
+
+target_link_libraries(commu utils debugTools)
\ No newline at end of file
diff --git a/src/communicate/tcp_server.cpp b/src/communicate/tcp_server.cpp
new file mode 100644
index 0000000..7dc2ca8
--- /dev/null
+++ b/src/communicate/tcp_server.cpp
@@ -0,0 +1,5 @@
+//
+// Created by 胡宇 on 2020/7/7.
+//
+
+#include "communicate/tcp_server.h"
diff --git a/src/utils/CMakeLists.txt b/src/utils/CMakeLists.txt
index 6d39b9b..0fd6aa0 100644
--- a/src/utils/CMakeLists.txt
+++ b/src/utils/CMakeLists.txt
@@ -1,3 +1,5 @@
-add_library(utils STATIC rsa_key_chain.cpp aes_cbc_encryptor.cpp random_generator.cpp)
+file(GLOB utilSrc *.cpp)
+
+add_library(utils STATIC ${utilSrc})
 
 target_link_libraries(utils debugTools ssl crypto)
\ No newline at end of file
diff --git a/src/utils/aes_cbc_encryptor.cpp b/src/utils/aes_cbc_encryptor.cpp
index bcf627c..33c06e9 100644
--- a/src/utils/aes_cbc_encryptor.cpp
+++ b/src/utils/aes_cbc_encryptor.cpp
@@ -66,3 +66,12 @@ void Net::AESCBCEncryptor::aes_init(string &key_data) {
     EVP_CIPHER_CTX_init(e_ctx);
     EVP_EncryptInit_ex(e_ctx, EVP_aes_256_cbc(), nullptr, key, iv);
 }
+
+string Net::AESCBCEncryptor::getKeyData() const {
+    return key_data;
+}
+
+Net::AESCBCEncryptor::AESCBCEncryptor() {
+    generate_random_key_data();
+    aes_init(key_data);
+}
diff --git a/src/utils/sha256_generator.cpp b/src/utils/sha256_generator.cpp
index cd75f18..09d3d91 100644
--- a/src/utils/sha256_generator.cpp
+++ b/src/utils/sha256_generator.cpp
@@ -1,10 +1,10 @@
 #include "type.h"
-#include "util/sha256_generator.h"
+#include "utils/sha256_generator.h"
 
 /**
  * Generate SHA256 Hex Code
  */
-void SHA256Generator::generate() {
+void Net::SHA256Generator::generate() {
     unsigned char hash[SHA256_DIGEST_LENGTH];
     SHA256_CTX sha256;
     SHA256_Init(&sha256);
@@ -19,3 +19,23 @@ void SHA256Generator::generate() {
     sha256_data = buffer.str();
     if_generate = true;
 }
+
+void Net::SHA256Generator::replace(string &str) {
+    this->raw_data = str;
+}
+
+string Net::SHA256Generator::getHex() {
+    if (!if_generate) generate();
+    return this->sha256_data;
+}
+
+Net::SHA256Generator::SHA256Generator(ifstream stream) {
+    while (stream.good()) {
+        stream >> raw_data;
+    }
+    stream.close();
+}
+
+Net::SHA256Generator::SHA256Generator(string data) {
+    this->raw_data = std::move(data);
+}
diff --git a/test/test_util/test_sha.cpp b/test/test_util/test_sha.cpp
new file mode 100644
index 0000000..b213fe6
--- /dev/null
+++ b/test/test_util/test_sha.cpp
@@ -0,0 +1,20 @@
+//
+// Created by 胡宇 on 2020/7/7.
+//
+
+#include <gtest/gtest.h>
+
+#include "utils/sha256_generator.h"
+#include "debug_tools/print_tools.h"
+
+using namespace Net;
+
+TEST(SHA256Test, base_test_1){
+    SHA256Generator generator("Hello World.");
+    generator.generate();
+
+    PrintTools::printInfo(generator.getHex(), "SHA256 Hex");
+
+    ASSERT_EQ(generator.getHex(),
+            std::string("f4bb1975bf1f81f76ce824f7536c1e101a8060a632a52289d530a6f600d52c92"));
+}
\ No newline at end of file