d-i debian-installer/locale string en_US

d-i debian-installer/language string en

d-i debian-installer/country string CN

d-i console-setup/ask_detect boolean false

d-i keyboard-configuration/layoutcode string us

d-i keyboard-configuration/variantcode string

#d-i passwd/user-fullname string

#d-i passwd/username string ubuntu

#d-i passwd/user-password password ubuntu

#d-i passwd/user-password-again password ubuntu

d-i passwd/root-login boolean true

d-i passwd/root-password-crypted password $default_password_crypted

d-i passwd/make-user boolean false

d-i user-setup/allow-password-weak boolean true

d-i netcfg/choose_interface select auto

d-i netcfg/get_hostname string unassigned-hostname

d-i netcfg/get_domain string unassigned-domain

d-i mirror/country string manual

d-i mirror/http/hostname string $http_server

d-i mirror/http/directory string $install_source_directory

d-i mirror/http/proxy string

d-i clock-setup/utc boolean true

d-i clock-setup/ntp boolean true

d-i time/zone string Asia/Shanghai

d-i partman/confirm boolean true

d-i partman/choose_partition select finish

d-i partman/confirm_nooverwrite boolean true

d-i partman-auto/disk string /dev/[sv]da

d-i partman-auto/method string lvm

d-i partman-auto/choose_recipe select atomic

d-i partman-lvm/device_remove_lvm boolean true

d-i partman-lvm/confirm boolean true

d-i partman-lvm/confirm_nooverwrite boolean true

d-i partman-auto-lvm/guided_size string max

d-i partman-partitioning/confirm_write_new_label boolean true

d-i grub-installer/grub2_instead_of_grub_legacy boolean true

d-i grub-installer/only_debian boolean true

d-i grub-installer/bootdev string /dev/[sv]da

d-i pkgsel/include string ntp ssh wget

d-i finish-install/reboot_in_progress note