diff --git a/shadowsocks-go.sh b/shadowsocks-go.sh
index c8ac131..65a9348 100644
--- a/shadowsocks-go.sh
+++ b/shadowsocks-go.sh
@@ -21,14 +21,26 @@ echo
 
 #Current folder
 cur_dir=`pwd`
+# Stream Ciphers
+ciphers=(
+aes-256-cfb
+aes-192-cfb
+aes-128-cfb
+aes-256-ctr
+aes-192-ctr
+aes-128-ctr
+chacha20-ietf
+chacha20
+rc4-md5
+)
+# Color
+red='\033[0;31m'
+green='\033[0;32m'
+yellow='\033[0;33m'
+plain='\033[0m'
 
 # Make sure only root can run our script
-rootness(){
-    if [[ $EUID -ne 0 ]]; then
-       echo "Error:This script must be run as root!" 1>&2
-       exit 1
-    fi
-}
+[[ $EUID -ne 0 ]] && echo -e "[${red}Error${plain}] This script must be run as root!" && exit 1
 
 #Check system
 check_sys(){
@@ -138,7 +150,7 @@ get_char(){
 # Pre-installation settings
 pre_install(){
     if ! check_sys packageManager yum && ! check_sys packageManager apt; then
-        echo "Error: Your OS is not supported. please change OS to CentOS/Debian/Ubuntu and try again."
+        echo -e "$[{red}Error${plain}] Your OS is not supported. please change OS to CentOS/Debian/Ubuntu and try again."
         exit 1
     fi
     # Set shadowsocks-go config password
@@ -166,13 +178,41 @@ pre_install(){
             echo
             break
         else
-            echo "Input error, please input correct number"
+            echo -e "[${red}Error${plain}] Input error, please input a number between 1 and 65535"
         fi
     else
-        echo "Input error, please input correct number"
+        echo -e "[${red}Error${plain}] Input error, please input a number between 1 and 65535"
     fi
     done
 
+    # Set shadowsocks config stream ciphers
+    while true
+    do
+    echo -e "Please select stream cipher for shadowsocks-go:"
+    for ((i=1;i<=${#ciphers[@]};i++ )); do
+        hint="${ciphers[$i-1]}"
+        echo -e "${green}${i}${plain}) ${hint}"
+    done
+    read -p "Which cipher you'd select(Default: ${ciphers[0]}):" pick
+    [ -z "$pick" ] && pick=1
+    expr ${pick} + 0 &>/dev/null
+    if [ $? -ne 0 ]; then
+        echo -e "[${red}Error${plain}] Input error, please input a number"
+        continue
+    fi
+    if [[ "$pick" -lt 1 || "$pick" -gt ${#ciphers[@]} ]]; then
+        echo -e "[${red}Error${plain}] Input error, please input a number between 1 and ${#ciphers[@]}"
+        continue
+    fi
+    shadowsockscipher=${ciphers[$pick-1]}
+    echo
+    echo "---------------------------"
+    echo "cipher = ${shadowsockscipher}"
+    echo "---------------------------"
+    echo
+    break
+    done
+
     echo
     echo "Press any key to start...or Press Ctrl+C to cancel"
     char=`get_char`
@@ -192,27 +232,23 @@ download_files(){
     cd ${cur_dir}
     if is_64bit; then
         if ! wget -c http://dl.teddysun.com/shadowsocks/shadowsocks-server-linux64-1.2.1.gz; then
-            echo "Failed to download shadowsocks-server-linux64-1.2.1.gz"
+            echo -e "[${red}Error${plain}] Failed to download shadowsocks-server-linux64-1.2.1.gz"
             exit 1
         fi
         gzip -d shadowsocks-server-linux64-1.2.1.gz
-        if [ $? -eq 0 ]; then
-            echo "Decompress shadowsocks-server-linux64-1.2.1.gz success"
-        else
-            echo "Decompress shadowsocks-server-linux64-1.2.1.gz failed"
+        if [ $? -ne 0 ]; then
+            echo -e "[${red}Error${plain}] Decompress shadowsocks-server-linux64-1.2.1.gz failed"
             exit 1
         fi
         mv -f shadowsocks-server-linux64-1.2.1 /usr/bin/shadowsocks-server
     else
         if ! wget -c http://dl.teddysun.com/shadowsocks/shadowsocks-server-linux32-1.2.1.gz; then
-            echo "Failed to download shadowsocks-server-linux32-1.2.1.gz"
+            echo -e "[${red}Error${plain}] Failed to download shadowsocks-server-linux32-1.2.1.gz"
             exit 1
         fi
         gzip -d shadowsocks-server-linux32-1.2.1.gz
-        if [ $? -eq 0 ]; then
-            echo "Decompress shadowsocks-server-linux32-1.2.1.gz success"
-        else
-            echo "Decompress shadowsocks-server-linux32-1.2.1.gz failed"
+        if [ $? -ne 0 ]; then
+            echo -e "[${red}Error${plain}] Decompress shadowsocks-server-linux32-1.2.1.gz failed"
             exit 1
         fi
         mv -f shadowsocks-server-linux32-1.2.1 /usr/bin/shadowsocks-server
@@ -221,12 +257,12 @@ download_files(){
     # Download start script
     if check_sys packageManager yum; then
         if ! wget --no-check-certificate -O /etc/init.d/shadowsocks https://raw.githubusercontent.com/teddysun/shadowsocks_install/master/shadowsocks-go; then
-            echo "Failed to download shadowsocks-go auto start script!"
+            echo -e "[${red}Error${plain}] Failed to download shadowsocks-go auto start script!"
             exit 1
         fi
     elif check_sys packageManager apt; then
         if ! wget --no-check-certificate -O /etc/init.d/shadowsocks https://raw.githubusercontent.com/teddysun/shadowsocks_install/master/shadowsocks-go-debian; then
-            echo "Failed to download shadowsocks-go auto start script!"
+            echo -e "[${red}Error${plain}] Failed to download shadowsocks-go auto start script!"
             exit 1
         fi
     fi
@@ -243,7 +279,7 @@ config_shadowsocks(){
     "server_port":${shadowsocksport},
     "local_port":1080,
     "password":"${shadowsockspwd}",
-    "method":"aes-256-cfb",
+    "method":"${shadowsockscipher}",
     "timeout":600
 }
 EOF
@@ -265,7 +301,7 @@ firewall_set(){
                 echo "port ${shadowsocksport} has been set up."
             fi
         else
-            echo "WARNING: iptables looks like shutdown or not installed, please manually set it if necessary."
+            echo -e "[${yellow}Warning${plain}] iptables looks like shutdown or not installed, please manually set it if necessary."
         fi
     elif centosversion 7; then
         systemctl status firewalld > /dev/null 2>&1
@@ -281,7 +317,7 @@ firewall_set(){
                 firewall-cmd --permanent --zone=public --add-port=${shadowsocksport}/udp
                 firewall-cmd --reload
             else
-                echo "WARNING: Try to start firewalld failed. please enable port ${shadowsocksport} manually if necessary."
+                echo -e "[${yellow}Warning${plain}] Try to start firewalld failed. please enable port ${shadowsocksport} manually if necessary."
             fi
         fi
     fi
@@ -292,7 +328,7 @@ firewall_set(){
 install(){
 
     if [ -f /usr/bin/shadowsocks-server ]; then
-        echo "shadowsocks-go install success!"
+        echo "Shadowsocks-go server install success!"
         chmod +x /usr/bin/shadowsocks-server
         chmod +x /etc/init.d/shadowsocks
 
@@ -304,25 +340,22 @@ install(){
         fi
 
         /etc/init.d/shadowsocks start
-        if [ $? -eq 0 ]; then
-            echo "Shadowsocks-go start success!"
-        else
-            echo "Shadowsocks-go start failed!"
+        if [ $? -ne 0 ]; then
+            echo -e "[${red}Error${plain}] Shadowsocks-go server start failed!"
         fi
     else
         echo
-        echo "Shadowsocks-go install failed!"
+        echo -e "[${red}Error${plain}] Shadowsocks-go server install failed!"
         exit 1
     fi
 
     clear
     echo
-    echo "Congratulations, Shadowsocks-go install completed!"
-    echo -e "Your Server IP: \033[41;37m $(get_ip) \033[0m"
-    echo -e "Your Server Port: \033[41;37m ${shadowsocksport} \033[0m"
-    echo -e "Your Password: \033[41;37m ${shadowsockspwd} \033[0m"
-    echo -e "Your Local Port: \033[41;37m 1080 \033[0m"
-    echo -e "Your Encryption Method: \033[41;37m aes-256-cfb \033[0m"
+    echo -e "Congratulations, Shadowsocks-go server install completed!"
+    echo -e "Your Server IP        : \033[41;37m $(get_ip) \033[0m"
+    echo -e "Your Server Port      : \033[41;37m ${shadowsocksport} \033[0m"
+    echo -e "Your Password         : \033[41;37m ${shadowsockspwd} \033[0m"
+    echo -e "Your Encryption Method: \033[41;37m ${shadowsockscipher} \033[0m"
     echo
     echo "Welcome to visit:https://teddysun.com/392.html"
     echo "Enjoy it!"
@@ -360,7 +393,6 @@ uninstall_shadowsocks_go(){
 
 # Install Shadowsocks-go
 install_shadowsocks_go(){
-    rootness
     disable_selinux
     pre_install
     download_files
diff --git a/shadowsocks.sh b/shadowsocks.sh
index c3e6cc7..20f7b0f 100644
--- a/shadowsocks.sh
+++ b/shadowsocks.sh
@@ -47,7 +47,7 @@ yellow='\033[0;33m'
 plain='\033[0m'
 
 # Make sure only root can run our script
-[[ $EUID -ne 0 ]] && echo -e "${red}Error:${plain} This script must be run as root!" && exit 1
+[[ $EUID -ne 0 ]] && echo -e "[${red}Error${plain}] This script must be run as root!" && exit 1
 
 # Disable selinux
 disable_selinux(){
@@ -151,11 +151,11 @@ pre_install(){
     if check_sys packageManager yum || check_sys packageManager apt; then
         # Not support CentOS 5
         if centosversion 5; then
-            echo -e "${red}Error:${plain} Not supported CentOS 5, please change to CentOS 6+/Debian 7+/Ubuntu 12+ and try again."
+            echo -e "$[{red}Error${plain}] Not supported CentOS 5, please change to CentOS 6+/Debian 7+/Ubuntu 12+ and try again."
             exit 1
         fi
     else
-        echo -e "${red}Error:${plain} Your OS is not supported. please change OS to CentOS/Debian/Ubuntu and try again."
+        echo -e "[${red}Error${plain}] Your OS is not supported. please change OS to CentOS/Debian/Ubuntu and try again."
         exit 1
     fi
     # Set shadowsocks config password
@@ -289,7 +289,7 @@ firewall_set(){
                 echo "port ${shadowsocksport} has already been set up."
             fi
         else
-            echo "[${yellow}Warning${plain}] iptables looks like shutdown or not installed, please manually set it if necessary."
+            echo -e "[${yellow}Warning${plain}] iptables looks like shutdown or not installed, please manually set it if necessary."
         fi
     elif centosversion 7; then
         systemctl status firewalld > /dev/null 2>&1