diff --git a/GRUB2/MOD_SRC/grub-2.04/grub-core/fs/squash4.c b/GRUB2/MOD_SRC/grub-2.04/grub-core/fs/squash4.c
index 5dbad6e1..06a4a3c0 100644
--- a/GRUB2/MOD_SRC/grub-2.04/grub-core/fs/squash4.c
+++ b/GRUB2/MOD_SRC/grub-2.04/grub-core/fs/squash4.c
@@ -405,24 +405,16 @@ static grub_ssize_t zstd_decompress_wrap(char *inbuf, grub_size_t insize, grub_o
 {
   char *udata = NULL;
   int usize = data->blksz;
+  if (usize < 8192)
+    usize = 8192;
 
-  if (off == 0)
-  {
-    ZSTD_decompress(outbuf, len, inbuf, insize);      
-  }
-  else
-  {
-    if (usize < 8192)
-      usize = 8192;
-
-    udata = grub_malloc (usize);
-    if (!udata)
-      return -1;
+  udata = grub_malloc (usize);
+  if (!udata)
+    return -1;
   
-    ZSTD_decompress(udata, usize, inbuf, insize);      
-    grub_memcpy(outbuf, udata + off, len);
-    grub_free(udata);
-  }
+  ZSTD_decompress(udata, usize, inbuf, insize);      
+  grub_memcpy(outbuf, udata + off, len);
+  grub_free(udata);
   
   return len;
 }
@@ -551,7 +543,7 @@ grub_squash_iterate_dir (grub_fshelp_node_t dir,
       break;
     case grub_cpu_to_le16_compile_time (SQUASH_TYPE_LONG_DIR):
       off = grub_le_to_cpu16 (dir->ino.long_dir.offset);
-      endoff = grub_le_to_cpu16 (dir->ino.long_dir.size) + off - 3;
+      endoff = grub_le_to_cpu32 (dir->ino.long_dir.size) + off - 3;
       chunk = grub_le_to_cpu32 (dir->ino.long_dir.chunk);
       break;
     default:
diff --git a/IMG/cpio/ventoy/hook/deepin/disk_mount_hook.sh b/IMG/cpio/ventoy/hook/deepin/disk_mount_hook.sh
new file mode 100644
index 00000000..4e00b8f1
--- /dev/null
+++ b/IMG/cpio/ventoy/hook/deepin/disk_mount_hook.sh
@@ -0,0 +1,40 @@
+#!/ventoy/busybox/sh
+#************************************************************************************
+# Copyright (c) 2020, longpanda <admin@ventoy.net>
+# 
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 3 of the
+# License, or (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, see <http://www.gnu.org/licenses/>.
+# 
+#************************************************************************************
+
+. /ventoy/hook/ventoy-hook-lib.sh
+
+vtlog "####### $0 $* ########"
+
+VTPATH_OLD=$PATH; PATH=$BUSYBOX_PATH:$VTOY_PATH/tool:$PATH
+
+wait_for_usb_disk_ready
+
+vtdiskname=$(get_ventoy_disk_name)
+if [ "$vtdiskname" = "unknown" ]; then
+    vtlog "ventoy disk not found"
+    PATH=$VTPATH_OLD
+    exit 0
+fi
+
+vtlog "${vtdiskname#/dev/}2 found..."
+$BUSYBOX_PATH/sh $VTOY_PATH/hook/debian/udev_disk_hook.sh "${vtdiskname#/dev/}2"
+
+if [ -f /ventoy/autoinstall ]; then
+    sh /ventoy/hook/default/auto_install_varexp.sh  /ventoy/autoinstall
+fi
diff --git a/IMG/cpio/ventoy/hook/deepin/udev_disk_hook.sh b/IMG/cpio/ventoy/hook/deepin/udev_disk_hook.sh
new file mode 100644
index 00000000..251f046b
--- /dev/null
+++ b/IMG/cpio/ventoy/hook/deepin/udev_disk_hook.sh
@@ -0,0 +1,151 @@
+#!/ventoy/busybox/sh
+#************************************************************************************
+# Copyright (c) 2020, longpanda <admin@ventoy.net>
+# 
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 3 of the
+# License, or (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, see <http://www.gnu.org/licenses/>.
+# 
+#************************************************************************************
+
+. /ventoy/hook/ventoy-hook-lib.sh
+
+ventoy_os_install_dmsetup() {
+
+    vtlog "ventoy_os_install_dmsetup $1 ..."
+
+    vt_usb_disk=$1
+
+    # dump iso file location
+    $VTOY_PATH/tool/vtoydm -i -f $VTOY_PATH/ventoy_image_map -d ${vt_usb_disk} > $VTOY_PATH/iso_file_list
+
+    # install dmsetup 
+    LINE=$($GREP ' dmsetup.*\.udeb'  $VTOY_PATH/iso_file_list)
+    if [ $? -eq 0 ]; then
+        install_udeb_from_line "$LINE" ${vt_usb_disk}
+    fi
+
+    # install libdevmapper
+    LINE=$($GREP ' libdevmapper.*\.udeb'  $VTOY_PATH/iso_file_list)
+    if [ $? -eq 0 ]; then
+        install_udeb_from_line "$LINE" ${vt_usb_disk}
+    fi
+
+    # install md-modules
+    LINE=$($GREP -i ' md-modules.*\.udeb'  $VTOY_PATH/iso_file_list)
+    if [ $? -eq 0 ]; then
+        LINTCNT=$($GREP -i -c ' md-modules.*\.udeb'  $VTOY_PATH/iso_file_list)
+        if [ $LINTCNT -gt 1 ]; then
+            vtlog "more than one pkgs, need to filter..."
+            VER=$($BUSYBOX_PATH/uname -r)
+            
+            LINE=$($GREP -i ' md-modules.*\.udeb'  $VTOY_PATH/iso_file_list | $GREP -i $VER)
+            LINTCNT=$($GREP -i ' md-modules.*\.udeb'  $VTOY_PATH/iso_file_list | $GREP -i -c $VER)
+            if [ $LINTCNT -gt 1 ]; then
+                vtlog "Still more than one pkgs, use the first one..."
+                LINE=$($GREP -i ' md-modules.*\.udeb'  $VTOY_PATH/iso_file_list | $GREP -i -m1 $VER)
+            fi
+        fi
+        install_udeb_from_line "$LINE" ${vt_usb_disk} 
+    fi
+
+    # insmod md-mod if needed
+    if $GREP -q 'device-mapper' /proc/devices; then
+        vtlog "device mapper module is loaded"
+    else
+        vtlog "device mapper module is NOT loaded, now load it..."
+        
+        VER=$($BUSYBOX_PATH/uname -r)    
+        KO=$($FIND /lib/modules/$VER/kernel/drivers/md -name "dm-mod*")
+        vtlog "KO=$KO"
+        
+        insmod $KO
+    fi
+    
+    vtlog "dmsetup install finish, now check it..."
+    if dmsetup info >> $VTLOG 2>&1; then
+        vtlog "dmsetup work ok"
+    else
+        vtlog "dmsetup not work, now try to load eglibc ..."
+        
+        # install eglibc (some ubuntu 32 bit version need it)
+        LINE=$($GREP 'libc6-.*\.udeb'  $VTOY_PATH/iso_file_list)
+        if [ $? -eq 0 ]; then
+            install_udeb_from_line "$LINE" ${vt_usb_disk} 
+        fi
+        
+        if dmsetup info >> $VTLOG 2>&1; then
+            vtlog "dmsetup work ok after retry"
+        else
+            vtlog "dmsetup still not work after retry"
+        fi
+    fi
+}
+
+if is_ventoy_hook_finished || not_ventoy_disk "${1:0:-1}"; then
+    exit 0
+fi
+
+vtlog "==== $0 $* ====" 
+
+dmsetup_path=$(ventoy_find_bin_path dmsetup)
+if [ -z "$dmsetup_path" ]; then
+    ventoy_os_install_dmsetup "/dev/${1:0:-1}"
+fi
+
+if ! $GREP -q 'device-mapper' /proc/devices; then
+    ventoy_os_install_dmsetup "/dev/${1:0:-1}"
+fi
+
+ventoy_udev_disk_common_hook $*
+
+#
+# Some distro default only accept usb partitions as install medium.
+# So if ventoy is installed on a non-USB device, we just mount /cdrom here except
+# for these has boot=live or boot=casper parameter in cmdline
+#
+VT_BUS_USB=""
+if [ -n "$ID_BUS" ]; then
+    if echo $ID_BUS | $GREP -q -i usb; then
+        VT_BUS_USB="YES"
+    fi
+else
+    if $BUSYBOX_PATH/ls -l /sys/class/block/${1:0:-1} | $GREP -q -i usb; then
+        VT_BUS_USB="YES"
+    fi
+fi
+
+if [ -n "$VT_BUS_USB" ]; then
+    vtlog "$1 is USB device"
+    echo /dev/$1 > /ventoy/list-devices-usb-part
+else
+    vtlog "$1 is NOT USB device (bus $ID_BUS)"
+    
+    if $EGREP -q 'boot=|casper' /proc/cmdline; then
+        vtlog "boot=, or casper, don't mount"
+    else
+        vtlog "No boot param, need to mount"
+        echo /dev/$1 > /ventoy/list-devices-usb-part
+    fi
+fi
+
+#special process for Linx
+if $BUSYBOX_PATH/uname -r | $GREP -q "^2\.6"; then
+    if $GREP -q "linx" /proc/version; then
+        blkdev_num=$($VTOY_PATH/tool/dmsetup ls | $GREP ventoy | $SED 's/.*(\([0-9][0-9]*\),.*\([0-9][0-9]*\).*/\1:\2/')  
+        vtDM=$(ventoy_find_dm_id ${blkdev_num}) 
+        echo "/dev/$vtDM" > /ventoy/list-devices-usb-part
+    fi
+fi
+
+# OK finish
+set_ventoy_hook_finish
diff --git a/IMG/cpio/ventoy/hook/deepin/ventoy-hook.sh b/IMG/cpio/ventoy/hook/deepin/ventoy-hook.sh
new file mode 100644
index 00000000..9625c623
--- /dev/null
+++ b/IMG/cpio/ventoy/hook/deepin/ventoy-hook.sh
@@ -0,0 +1,42 @@
+#!/ventoy/busybox/sh
+#************************************************************************************
+# Copyright (c) 2020, longpanda <admin@ventoy.net>
+# 
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 3 of the
+# License, or (at your option) any later version.
+# 
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+# 
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, see <http://www.gnu.org/licenses/>.
+# 
+#************************************************************************************
+
+
+if [ -e /init ] && $GREP -q '^mountroot$' /init; then
+    echo "Here before mountroot ..." >> $VTLOG
+    
+    $SED  "/^mountroot$/i\\$BUSYBOX_PATH/sh $VTOY_PATH/hook/deepin/disk_mount_hook.sh"  -i /init
+    $SED  "/^mountroot$/i\\export LIVEMEDIA=/dev/mapper/ventoy"  -i /init
+    $SED  "/^mountroot$/i\\export LIVE_MEDIA=/dev/mapper/ventoy"  -i /init    
+
+    if $GREP -q 'live-media=' /proc/cmdline; then
+        if [ -f /scripts/casper ] && $GREP -q '^  *LIVEMEDIA=' /scripts/casper; then
+            $SED "s#^  *LIVEMEDIA=.*#LIVEMEDIA=/dev/mapper/ventoy#" -i /scripts/casper
+        fi
+    fi
+else
+    echo "Here use udev hook ..." >> $VTLOG
+    ventoy_systemd_udevd_work_around
+    ventoy_add_udev_rule "$VTOY_PATH/hook/deepin/udev_disk_hook.sh %k"
+fi
+
+if [ -f $VTOY_PATH/autoinstall ]; then
+    echo "Do auto install ..." >> $VTLOG
+    $SED '/maybe_break[[:space:]]*init/i\/ventoy/busybox/sh /ventoy/hook/deepin/ventoy_autoinstall.sh >>/ventoy/autoinstall.log 2>&1' -i /init
+fi
diff --git a/IMG/cpio/ventoy/hook/deepin/ventoy_autoinstall.sh b/IMG/cpio/ventoy/hook/deepin/ventoy_autoinstall.sh
new file mode 100644
index 00000000..5e6f581c
--- /dev/null
+++ b/IMG/cpio/ventoy/hook/deepin/ventoy_autoinstall.sh
@@ -0,0 +1,122 @@
+#!/ventoy/busybox/sh
+
+. /ventoy/hook/ventoy_hook_lib.sh
+
+change_var_value() {
+    local vfile=$1
+    local vkey=$2
+    local vVal=$3
+    local quote=$4
+    local vline
+    
+    if [ $quote -eq 0 ]; then
+        vline="$vkey = $vVal"
+    else
+        vline="$vkey = \"$vVal\""
+    fi
+    
+    if grep -q -m1 "^$vkey[[:space:]]*=" $vfile; then
+        sed "s#^$vkey[[:space:]]*=.*#$vline#g" -i $vfile
+    else
+        echo "$vline" >> $vfile
+    fi
+}
+
+setting_script_process() {
+    local sfile=$1
+    local vItem
+    local vB64Item
+    
+    vItem=$(grep '^language[[:space:]]*=' /ventoy/autoinstall | awk  '{print $3}')
+    if [ -n "$vItem" ]; then
+        change_var_value $sfile 'select_language_default_locale' "$vItem" 0
+    fi
+    
+    vItem=$(grep '^timezone[[:space:]]*=' /ventoy/autoinstall | awk  '{print $3}')
+    if [ -n "$vItem" ]; then
+        change_var_value $sfile 'timezone_default' "$vItem" 0
+    fi
+    
+    vItem=$(grep '^hostname[[:space:]]*=' /ventoy/autoinstall | awk  '{print $3}')
+    if [ -n "$vItem" ]; then
+        change_var_value $sfile 'system_info_default_hostname' "$vItem" 1
+        change_var_value $sfile 'DI_HOSTNAME' "$vItem" 1
+    fi
+    
+    vItem=$(grep '^root_password[[:space:]]*=' /ventoy/autoinstall | awk  '{print $3}')
+    if [ -n "$vItem" ]; then
+        vB64Item=$(echo -n "$vItem" | base64)
+        change_var_value $sfile 'system_info_default_root_password' "$vB64Item" 1
+        change_var_value $sfile 'DI_ROOTPASSWORD' "$vB64Item" 1
+    fi
+    
+    vItem=$(grep '^default_username[[:space:]]*=' /ventoy/autoinstall | awk  '{print $3}')
+    if [ -n "$vItem" ]; then
+        change_var_value $sfile 'system_info_default_username' "$vItem" 1
+        change_var_value $sfile 'DI_USERNAME' "$vItem" 1
+    fi
+    
+    vItem=$(grep '^default_password[[:space:]]*=' /ventoy/autoinstall | awk  '{print $3}')
+    if [ -n "$vItem" ]; then
+        change_var_value $sfile 'system_info_default_password' "$vItem" 1
+        change_var_value $sfile 'DI_PASSWORD' "$vItem" 1
+    fi
+    
+    vItem=$(grep '^install_disk[[:space:]]*=' /ventoy/autoinstall | awk  '{print $3}')
+    if [ -n "$vItem" ]; then
+        echo "DI_FULLDISK_MULTIDISK_DEVICE = $vItem" >> $sfile
+        echo "DI_ROOTDISK = $vItem" >> $sfile
+        echo "DI_BOOTLOADER = $vItem" >> $sfile
+    fi
+    
+    change_var_value $sfile 'skip_virtual_machine_page' 'true' 0
+    change_var_value $sfile 'skip_select_language_page' 'true' 0
+    change_var_value $sfile 'skip_select_language_page_on_first_boot' 'true' 0
+    change_var_value $sfile 'skip_system_keyboard_page' 'true' 0
+    change_var_value $sfile 'skip_system_info_page' 'true' 0
+    change_var_value $sfile 'skip_qr_code_system_info_page' 'true' 0
+    change_var_value $sfile 'skip_timezone_page' 'true' 0
+    change_var_value $sfile 'skip_partition_page' 'true' 0
+    change_var_value $sfile 'system_info_password_validate_required' '0' 0
+    change_var_value $sfile 'system_info_password_strong_check' 'false' 0
+    change_var_value $sfile 'partition_do_auto_part' 'true' 0
+    change_var_value $sfile 'system_info_disable_license' 'true' 0
+    change_var_value $sfile 'system_info_disable_experience' 'true' 0
+    change_var_value $sfile 'system_info_disable_privacy_license' 'true' 0
+    
+    #filesystem.squashfs search ini
+    #first_page_state=0，表示不跳过首页，展示首页让用户自己选择
+    #first_page_state=1，表示跳过首页，并且自动点击一键安装
+    #first_page_state=2，表示跳过首页，并且自动点击自定义安装
+    #first_page_state=3，表示跳过首页，并且直接以全盘安装方式自动安装
+    change_var_value $sfile 'first_page_state' '3' 0
+}
+
+update_settings() {
+    local script=$1
+    local newscript
+    
+    echo "update_settings for $script ..."
+    
+    newscript=$(basename $script)
+    cp -a $script /ventoy/vini_${newscript}
+    setting_script_process /ventoy/vini_${newscript}
+    
+    rm -f $script
+    cp -a /ventoy/vini_${newscript} $script
+}
+
+sh /ventoy/hook/common/auto_install_varexp.sh  /ventoy/autoinstall
+
+update_settings /root/usr/share/deepin-installer/resources/default_settings.ini
+
+ls -1 /root/usr/share/deepin-installer/resources/override/ | while read line; do
+    update_settings /root/usr/share/deepin-installer/resources/override/$line
+done
+
+ls -1 /root/usr/share/deepin-installer/resources/oem/ | while read line; do
+    update_settings /root/usr/share/deepin-installer/resources/oem/$line
+done
+
+
+
diff --git a/IMG/cpio/ventoy/ventoy_chain.sh b/IMG/cpio/ventoy/ventoy_chain.sh
index 5b6be59a..cae7c4fd 100644
--- a/IMG/cpio/ventoy/ventoy_chain.sh
+++ b/IMG/cpio/ventoy/ventoy_chain.sh
@@ -64,9 +64,9 @@ ventoy_get_os_type() {
     elif $GREP -q '[Uu]buntu' /proc/version; then
         echo 'debian'; return
         
-    # Deepin : do the same process with debian
+    # Deepin :
     elif $GREP -q '[Dd]eepin' /proc/version; then
-        echo 'debian'; return
+        echo 'deepin'; return
 
     # rhel5/CentOS5 and all other distributions based on them
     elif $GREP -q 'el5' /proc/version; then
@@ -169,9 +169,9 @@ ventoy_get_os_type() {
         elif $GREP -q 'fuyu' /etc/os-release; then
             echo 'openEuler'; return
         elif $GREP -q 'deepin' /etc/os-release; then
-            echo 'debian'; return
+            echo 'deepin'; return
         elif $GREP -q 'chinauos' /etc/os-release; then
-            echo 'debian'; return
+            echo 'deepin'; return
         fi
     fi