diff --git a/README.en.md b/README.en.md
index 0f00d2e..7b39832 100644
--- a/README.en.md
+++ b/README.en.md
@@ -11,7 +11,7 @@ Reinstall server with one-click [中文](README.md)
 
 ## Highlights
 
-- Support installation of 13 common Linux distributions.
+- Support installation of 16 common Linux distributions.
 - Support for installing Windows using the official original ISO. The script can automatically search for the ISO and drivers.
 - Support reinstallation in any direction, meaning `Linux to Linux`, `Linux to Win`, `Win to Win`, `Win to Linux`.
 - Specifically tailored for low-spec machines, addressing insufficient memory that prevents network installation.
diff --git a/README.md b/README.md
index 706749d..91592e3 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,7 @@
 
 ## 亮点
 
-- 支持安装 13 种常见 Linux 发行版
+- 支持安装 16 种常见 Linux 发行版
 - 支持用官方原版 iso 安装 Windows，并且脚本会自动查找 iso 和驱动
 - 支持任意方向重装，也就是支持 `Linux to Linux`、`Linux to Win`、`Win to Win`、`Win to Linux`
 - 专门适配低配小鸡，解决内存过少导致无法进行网络安装
diff --git a/reinstall.sh b/reinstall.sh
index 82fe1d3..925c057 100644
--- a/reinstall.sh
+++ b/reinstall.sh
@@ -93,12 +93,12 @@ curl() {
             return
         else
             ret=$?
-            if [ $ret -eq 22 ]; then
-                # 403 404 错误
+            # 403 404 错误，或者达到重试次数
+            if [ $ret -eq 22 ] || [ $i -eq 5 ]; then
                 return $ret
             fi
+            sleep 1
         fi
-        sleep 1
     done
 }
 
@@ -1298,34 +1298,30 @@ install_pkg() {
         esac
     }
 
-    is_need_epel_repo() {
-        case "$pkg" in
-        dpkg) [ "$pkg_mgr" = yum ] || [ "$pkg_mgr" = dnf ] ;;
-        jq) [ "$pkg_mgr" = yum ] ;; # el7/ol7
-        *) false ;;
-        esac
-    }
+    # 系统                                 package名称              repo名称
+    # centos/alma/rocky/fedora/anolis      epel-release             epel
+    # oracle linux                         oracle-epel-release      ol9_developer_EPEL
+    # opencloudos                          epol-release             EPOL
+    check_is_need_epel() {
+        is_need_epel() {
+            case "$pkg" in
+            dpkg) true ;;
+            jq) is_have_cmd yum && ! is_have_cmd dnf ;; # el7/ol7 的 jq 在 epel 仓库
+            *) false ;;
+            esac
+        }
 
-    add_epel_repo() {
-        # epel 名称可能是 epel 或 ol9_developer_EPEL
-        # 如果没启用
-        if ! $pkg_mgr repolist | awk '{print $1}' | grep -qi 'epel$'; then
-            #  删除 epel repo，因为可能安装了但未启用
-            rm -rf /etc/yum.repos.d/*epel*.repo
-            epel_release="$($pkg_mgr list | grep 'epel-release' | awk '{print $1}' | cut -d. -f1 | head -1)"
+        try_find_epel_name() {
+            epel=$($pkg_mgr repolist --all | awk '{print $1}' | grep -Ei '(epel|epol)$')
+        }
 
-            # 如果已安装
-            if rpm -q $epel_release; then
-                # 检查是否为最新
-                if $pkg_mgr check-update $epel_release; then
-                    $pkg_mgr reinstall -y $epel_release
-                else
-                    $pkg_mgr update -y $epel_release
-                fi
-            else
-                # 如果未安装
+        if is_need_epel; then
+            if ! try_find_epel_name; then
+                epel_release="$($pkg_mgr list | grep -E '(epel|epol)-release' | awk '{print $1}' | cut -d. -f1 | head -1)"
                 $pkg_mgr install -y $epel_release
+                try_find_epel_name
             fi
+            enable_epel="--enablerepo=$epel"
         fi
     }
 
@@ -1337,8 +1333,14 @@ install_pkg() {
         echo "Installing package '$text'..."
 
         case $pkg_mgr in
-        dnf) dnf install -y --setopt=install_weak_deps=False $pkg ;;
-        yum) yum install -y $pkg ;;
+        dnf)
+            check_is_need_epel
+            dnf install $enable_epel -y --setopt=install_weak_deps=False $pkg
+            ;;
+        yum)
+            check_is_need_epel
+            yum install $enable_epel -y $pkg
+            ;;
         emerge) emerge --oneshot $pkg ;;
         pacman) pacman -Syu --noconfirm --needed $pkg ;;
         zypper) zypper install -y $pkg ;;
@@ -1381,9 +1383,6 @@ install_pkg() {
                 error_and_exit "Can't find compatible package manager. Please manually install $cmd."
             fi
             cmd_to_pkg
-            if is_need_epel_repo; then
-                add_epel_repo
-            fi
             install_pkg_real
         fi
     done
@@ -2002,7 +2001,7 @@ build_finalos_cmdline() {
 }
 
 build_extra_cmdline() {
-    for key in confhome hold cloud_image main_disk; do
+    for key in confhome hold force cloud_image main_disk; do
         value=${!key}
         if [ -n "$value" ]; then
             extra_cmdline+=" extra.$key='$value'"
@@ -2695,7 +2694,7 @@ else
 fi
 
 # 整理参数
-if ! opts=$(getopt -n $0 -o "" --long ci,debug,hold:,sleep:,iso:,image-name:,img:,lang:,commit: -- "$@"); then
+if ! opts=$(getopt -n $0 -o "" --long ci,debug,hold:,sleep:,iso:,image-name:,img:,lang:,commit:,force: -- "$@"); then
     usage_and_exit
 fi
 
@@ -2722,6 +2721,13 @@ while true; do
         fi
         shift 2
         ;;
+    --force)
+        force=$2
+        if ! { [ "$force" = bios ] || [ "$force" = efi ]; }; then
+            error_and_exit "Invalid --force value: $force."
+        fi
+        shift 2
+        ;;
     --img)
         img=$2
         shift 2
@@ -3088,10 +3094,11 @@ if is_use_grub; then
 
     get_function_content load_grubenv_if_not_loaded >$target_cfg
 
+    # 原系统为 openeuler 云镜像，需要添加 --unrestricted，否则要输入密码
     del_empty_lines <<EOF | tee -a $target_cfg
 set timeout_style=menu
 set timeout=5
-menuentry "$(get_entry_name)" {
+menuentry "$(get_entry_name)" --unrestricted {
     $(! is_in_windows && echo 'insmod lvm')
     $(is_os_in_btrfs && echo 'set btrfs_relative_path=n')
     insmod all_video
diff --git a/trans.sh b/trans.sh
index 5394440..67dc024 100644
--- a/trans.sh
+++ b/trans.sh
@@ -8,6 +8,7 @@ set -eE
 
 # debian 安装版、ubuntu 安装版、redhat 安装版不使用该密码
 PASSWORD=123@@@
+EFI_UUID=C12A7328-F81F-11D2-BA4B-00A0C93EC93B
 
 TRUE=0
 FALSE=1
@@ -38,7 +39,7 @@ trap_err() {
 error() {
     color='\e[31m'
     plain='\e[0m'
-    echo -e "${color}Error: $*${plain}"
+    echo -e "${color}Error: $*${plain}" >&2
 }
 
 error_and_exit() {
@@ -73,8 +74,16 @@ apk() {
 wget() {
     echo "$@" | grep -o 'http[^ ]*' >&2
     for i in $(seq 5); do
-        command wget "$@" && return
-        sleep 1
+        if command wget "$@"; then
+            return
+        else
+            ret=$?
+            # 错误，或者达到重试次数
+            if [ $i -eq 5 ]; then
+                return $ret
+            fi
+            sleep 1
+        fi
     done
 }
 
@@ -182,7 +191,11 @@ update_part() {
 }
 
 is_efi() {
-    [ -d /sys/firmware/efi/ ]
+    if [ -n "$force" ]; then
+        [ "$force" = efi ]
+    else
+        [ -d /sys/firmware/efi/ ]
+    fi
 }
 
 is_use_cloud_image() {
@@ -595,7 +608,6 @@ grep_efi_index() {
 add_fallback_efi_to_nvram() {
     apk add lsblk efibootmgr
 
-    EFI_UUID=C12A7328-F81F-11D2-BA4B-00A0C93EC93B
     efi_row=$(lsblk /dev/$xda -ro NAME,PARTTYPE,PARTUUID | grep -i "$EFI_UUID")
     efi_part_uuid=$(echo "$efi_row" | awk '{print $3}')
     efi_part_name=$(echo "$efi_row" | awk '{print $1}')
@@ -3396,7 +3408,8 @@ install_windows() {
     else
         # 或者用 ms-sys
         apk add grub-bios
-        grub-install --boot-directory=/os/boot /dev/$xda
+        # efi 下，强制安装 mbr 引导，需要添加 --target i386-pc
+        grub-install --target i386-pc --boot-directory=/os/boot /dev/$xda
         cat <<EOF >/os/boot/grub/grub.cfg
             set timeout=5
             menuentry "reinstall" {