diff --git a/common.sh b/common.sh
new file mode 100644
index 0000000..71495a8
--- /dev/null
+++ b/common.sh
@@ -0,0 +1,62 @@
+#!/bin/bash
+
+# 安装 Image Builder 构建所需依赖
+install_dependencies() {
+  sudo apt install -y build-essential libncurses-dev zlib1g-dev gawk git \
+    gettext libssl-dev xsltproc rsync wget unzip python3 qemu-utils mkisofs zstd
+}
+
+# =============================================================
+# 交互输入函数
+# 参数1: 提示信息
+# 参数2: 默认值
+# 返回: 用户输入值，直接回车返回默认值
+# =============================================================
+ask_input() {
+  local prompt="$1"
+  local default="$2"
+
+  read -p "${prompt} [ 默认: ${default} ]: " value
+
+  if [ -z "$value" ]; then
+    echo "$default"
+  else
+    echo "$value"
+  fi
+}
+
+# 获取lan口ip
+input_lan_ip() {
+  local default_ip="$1"
+
+  while true; do
+    local ip
+
+    ip=$(ask_input "请输入lan口ip" "$default_ip")
+
+    if valid_ipv4 "$ip"; then
+      echo "$ip"
+      return 0
+    else
+      echo "[错误] IP地址格式不正确，请重新输入" >&2
+    fi
+  done
+}
+
+valid_ipv4() {
+  local ip="$1"
+
+  # 第一层：检查格式，必须是4段数字
+  echo "$ip" | grep -Eq '^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$' || return 1
+
+  # 第二层：检查每段范围
+  echo "$ip" | awk -F. '
+    $1>=0 && $1<=255 &&
+    $2>=0 && $2<=255 &&
+    $3>=0 && $3<=255 &&
+    $4>=0 && $4<=255
+  ' | grep -q . || return 1
+
+  return 0
+}
+
diff --git a/hiwifi-b70.sh b/hiwifi-b70.sh
index 9cad896..bb67261 100644
--- a/hiwifi-b70.sh
+++ b/hiwifi-b70.sh
@@ -1,10 +1,7 @@
 #!/bin/bash
 set -e
 
-install_dependencies() {
-  sudo apt install -y build-essential libncurses-dev zlib1g-dev gawk git \
-    gettext libssl-dev xsltproc rsync wget unzip python3 qemu-utils mkisofs zstd
-}
+source common.sh
 
 download_imagebuilder() {
   local version="$1"
@@ -156,59 +153,7 @@ build() {
   echo -e "固件输出: ${PROJECT_OUTPUT_DIR}"
 }
 
-# =============================================================
-# 交互输入函数
-# 参数1: 提示信息
-# 参数2: 默认值
-# 返回: 用户输入值，直接回车返回默认值
-# =============================================================
-ask_input() {
-  local prompt="$1"
-  local default="$2"
 
-  read -p "${prompt} [ 默认: ${default} ]: " value
-
-  if [ -z "$value" ]; then
-    echo "$default"
-  else
-    echo "$value"
-  fi
-}
-
-# 获取lan口ip
-input_lan_ip() {
-  local default_ip="$1"
-
-  while true; do
-    local ip
-
-    ip=$(ask_input "请输入lan口ip" "$default_ip")
-
-    if valid_ipv4 "$ip"; then
-      echo "$ip"
-      return 0
-    else
-      echo "[错误] IP地址格式不正确，请重新输入" >&2
-    fi
-  done
-}
-
-valid_ipv4() {
-  local ip="$1"
-
-  # 第一层：检查格式，必须是4段数字
-  echo "$ip" | grep -Eq '^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$' || return 1
-
-  # 第二层：检查每段范围
-  echo "$ip" | awk -F. '
-    $1>=0 && $1<=255 &&
-    $2>=0 && $2<=255 &&
-    $3>=0 && $3<=255 &&
-    $4>=0 && $4<=255
-  ' | grep -q . || return 1
-
-  return 0
-}
 project_dir="$(cd "$(dirname "$0")" && pwd)"
 cd "$project_dir"
 
diff --git a/newifi3_d2.sh b/newifi3_d2.sh
index 94ff09f..413e348 100644
--- a/newifi3_d2.sh
+++ b/newifi3_d2.sh
@@ -1,10 +1,7 @@
 #!/bin/bash
 set -e
 
-install_dependencies() {
-  sudo apt install -y build-essential libncurses-dev zlib1g-dev gawk git \
-    gettext libssl-dev xsltproc rsync wget unzip python3 qemu-utils mkisofs zstd
-}
+source common.sh
 
 download_imagebuilder() {
   local version="$1"
@@ -32,24 +29,7 @@ download_imagebuilder() {
   echo "$(pwd)/$folder"
 }
 
-# =============================================================
-# 交互输入函数
-# 参数1: 提示信息
-# 参数2: 默认值
-# 返回: 用户输入值，直接回车返回默认值
-# =============================================================
-ask_input() {
-  local prompt="$1"
-  local default="$2"
 
-  read -p "${prompt} [ 默认: ${default} ]: " value
-
-  if [ -z "$value" ]; then
-    echo "$default"
-  else
-    echo "$value"
-  fi
-}
 
 build() {
   # =============================================================
@@ -174,40 +154,8 @@ build() {
   echo -e "固件输出: ${PROJECT_OUTPUT_DIR}"
 }
 
-# 获取lan口ip
-input_lan_ip() {
-  local default_ip="$1"
 
-  while true; do
-    local ip
 
-    ip=$(ask_input "请输入lan口ip" "$default_ip")
-
-    if valid_ipv4 "$ip"; then
-      echo "$ip"
-      return 0
-    else
-      echo "[错误] IP地址格式不正确，请重新输入" >&2
-    fi
-  done
-}
-
-valid_ipv4() {
-  local ip="$1"
-
-  # 第一层：检查格式，必须是4段数字
-  echo "$ip" | grep -Eq '^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$' || return 1
-
-  # 第二层：检查每段范围
-  echo "$ip" | awk -F. '
-    $1>=0 && $1<=255 &&
-    $2>=0 && $2<=255 &&
-    $3>=0 && $3<=255 &&
-    $4>=0 && $4<=255
-  ' | grep -q . || return 1
-
-  return 0
-}
 
 project_dir="$(cd "$(dirname "$0")" && pwd)"
 cd "$project_dir"
diff --git a/r2s.sh b/r2s.sh
index f4da511..1156225 100644
--- a/r2s.sh
+++ b/r2s.sh
@@ -1,11 +1,7 @@
 #!/bin/bash
 set -e
 
-# 安装 Image Builder 构建所需依赖
-install_dependencies() {
-  sudo apt install -y build-essential libncurses-dev zlib1g-dev gawk git \
-    gettext libssl-dev xsltproc rsync wget unzip python3 qemu-utils mkisofs zstd
-}
+source common.sh
 
 # 下载并解压 FriendlyARM NanoPi R2S 的 Image Builder
 # 参数 1: ImmortalWrt 版本号，例如 25.12.1
@@ -203,59 +199,6 @@ build(){
   fi
 }
 
-# =============================================================
-# 交互输入函数
-# 参数1: 提示信息
-# 参数2: 默认值
-# 返回: 用户输入值，直接回车返回默认值
-# =============================================================
-ask_input() {
-  local prompt="$1"
-  local default="$2"
-
-  read -p "${prompt} [ 默认: ${default} ]: " value
-
-  if [ -z "$value" ]; then
-    echo "$default"
-  else
-    echo "$value"
-  fi
-}
-
-# 获取lan口ip
-input_lan_ip() {
-  local default_ip="$1"
-
-  while true; do
-    local ip
-
-    ip=$(ask_input "请输入lan口ip" "$default_ip")
-
-    if valid_ipv4 "$ip"; then
-      echo "$ip"
-      return 0
-    else
-      echo "[错误] IP地址格式不正确，请重新输入" >&2
-    fi
-  done
-}
-
-valid_ipv4() {
-  local ip="$1"
-
-  # 第一层：检查格式，必须是4段数字
-  echo "$ip" | grep -Eq '^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$' || return 1
-
-  # 第二层：检查每段范围
-  echo "$ip" | awk -F. '
-    $1>=0 && $1<=255 &&
-    $2>=0 && $2<=255 &&
-    $3>=0 && $3<=255 &&
-    $4>=0 && $4<=255
-  ' | grep -q . || return 1
-
-  return 0
-}
 
 # 项目根目录，保证从任意位置执行 r2s.sh 都能找到其他资源
 project_dir="$(cd "$(dirname "$0")" && pwd)"
diff --git a/x86-64.sh b/x86-64.sh
index 1e3adda..f385717 100644
--- a/x86-64.sh
+++ b/x86-64.sh
@@ -1,11 +1,7 @@
 #!/bin/bash
 set -e
 
-# 安装 Image Builder 构建所需依赖
-install_dependencies() {
-  sudo apt install -y build-essential libncurses-dev zlib1g-dev gawk git \
-    gettext libssl-dev xsltproc rsync wget unzip python3 qemu-utils mkisofs zstd
-}
+source common.sh
 
 # 下载并解压 x86-64 的 Image Builder
 # 参数 1: ImmortalWrt 版本号，例如 25.12.1
@@ -229,60 +225,6 @@ build(){
 
 }
 
-# =============================================================
-# 交互输入函数
-# 参数1: 提示信息
-# 参数2: 默认值
-# 返回: 用户输入值，直接回车返回默认值
-# =============================================================
-ask_input() {
-  local prompt="$1"
-  local default="$2"
-
-  read -p "${prompt} [ 默认: ${default} ]: " value
-
-  if [ -z "$value" ]; then
-    echo "$default"
-  else
-    echo "$value"
-  fi
-}
-
-# 获取lan口ip
-input_lan_ip() {
-  local default_ip="$1"
-
-  while true; do
-    local ip
-
-    ip=$(ask_input "请输入lan口ip" "$default_ip")
-
-    if valid_ipv4 "$ip"; then
-      echo "$ip"
-      return 0
-    else
-      echo "[错误] IP地址格式不正确，请重新输入" >&2
-    fi
-  done
-}
-
-valid_ipv4() {
-  local ip="$1"
-
-  # 第一层：检查格式，必须是4段数字
-  echo "$ip" | grep -Eq '^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$' || return 1
-
-  # 第二层：检查每段范围
-  echo "$ip" | awk -F. '
-    $1>=0 && $1<=255 &&
-    $2>=0 && $2<=255 &&
-    $3>=0 && $3<=255 &&
-    $4>=0 && $4<=255
-  ' | grep -q . || return 1
-
-  return 0
-}
-
 
 # 要构建的 ImmortalWrt 版本, 可以在 https://github.com/immortalwrt/immortalwrt 查询版本号
 default_version="25.12.1"