diff --git a/configuration.nix.bak b/configuration.nix.bak
deleted file mode 100644
index fa351a2..0000000
--- a/configuration.nix.bak
+++ /dev/null
@@ -1,186 +0,0 @@
-# Edit this configuration file to define what should be installed on
-# your system.  Help is available in the configuration.nix(5) man page
-# and in the NixOS manual (accessible by running ‘nixos-help’).
-
-{ config, pkgs, ... }:
-
-{
-  imports =
-    [ # Include the results of the hardware scan.
-      ./hardware-configuration.nix
-    ];
-
-  # Allow uNfReE software
-  nixpkgs.config.allowUnfree = true;
-
-  # S0m3 f0nt5
-  fonts.fonts = with pkgs; [
-    noto-fonts
-    noto-fonts-cjk
-    noto-fonts-emoji
-    meslo-lgs-nf
-    wqy_zenhei
-    hack-font
-  ];
-  
-  # NUR Source
-  nixpkgs.config.packageOverrides = pkgs: {
-  nur = import (builtins.fetchTarball "https://github.com/nix-community/NUR/archive/master.tar.gz") {
-    inherit pkgs;
-   };
-  };  
-  
-  # USTC Source
-  nix.settings.substituters = [ "https://mirrors.ustc.edu.cn/nix-channels/store" ];
-  
-  # Virtual Box
-  virtualisation.virtualbox.host.enable = true;
-  users.extraGroups.vboxusers.members = [ "lzc256" ];
-  
-  # Steam
-  programs.steam.enable = true;
-  
-  # Realtek Wireless Driver
-  boot.extraModulePackages = [ config.boot.kernelPackages.rtl8821cu ];
- 
-  # AMD Graphics card driver
-  hardware.opengl.extraPackages = with pkgs; [
-   rocm-opencl-icd
-   rocm-opencl-runtime
-   pkgs.amdvlk
-];
-
-  # Use the grub EFI boot loader
-  boot.loader = {
-    efi = {
-      canTouchEfiVariables = true;
-      efiSysMountPoint = "/boot";
-    };
-    grub = {
-       efiSupport = true;
-       device = "nodev";
-    };
-  };
-
-  # Use the systemd-boot EFI boot loader.
-  #boot.loader.systemd-boot.enable = true;
-  #boot.loader.efi.canTouchEfiVariables = true;
-
-  networking.hostName = "b85"; # Define your hostname.
-  networking.wireless.enable = true;  # Enables wireless support via wpa_supplicant.
-
-  # Set your time zone.
-  time.timeZone = "Asia/Shanghai";
-
-  # The global useDHCP flag is deprecated, therefore explicitly set to false here.
-  # Per-interface useDHCP will be mandatory in the future, so this generated config
-  # replicates the default behaviour.
-  #networking.useDHCP = false;
-  #networking.interfaces.eno1.useDHCP = true;
-
-  # Use NetworkManager
-  networking.networkmanager.enable = true;
-
-  # Configure network proxy if necessary
-  # networking.proxy.default = "http://127.0.0.1:7890/";
-  # networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";
-
-  # Select internationalisation properties.
-  i18n.defaultLocale = "zh_CN.UTF-8";
-   console = {
-      font = "DroidSansMono";
-      keyMap = "us";
-   };
- i18n.inputMethod.enabled = "fcitx5";
- i18n.inputMethod.fcitx5.addons = with pkgs; [ fcitx5-chinese-addons nur.repos.xddxdd.rime-moegirl nur.repos.xddxdd.rime-zhwiki nur.repos.xddxdd.fcitx5-breeze ];
-
-  # Enable the X11 windowing system.
-  services.xserver.enable = true;
-
-
-  # Enable the Plasma 5 Desktop Environment.
-  services.xserver.displayManager.sddm.enable = true;
-  services.xserver.desktopManager.plasma5.enable = true;
-  
-
-  # Configure keymap in X11
-  # services.xserver.layout = "us";
-  # services.xserver.xkbOptions = "eurosign:e";
-
-  # Enable CUPS to print documents.
-  services.printing.enable = true;
-
-  # Enable sound.
-  sound.enable = true;
-  hardware.pulseaudio.enable = true;
-
-  # Bluetooth 
-  hardware.bluetooth.enable = true;
-  hardware.bluetooth.powerOnBoot = true;
-
-  # Enable touchpad support (enabled default in most desktopManager).
-  # services.xserver.libinput.enable = true;
-
-  # Define a user account. Don't forget to set a password with ‘passwd’.
-  users.users.lzc256 = {
-     isNormalUser = true;
-     shell = pkgs.zsh; # Use ZSH
-     extraGroups = [ "wheel" "video" ]; # Enable ‘sudo’ for the user.
-   };
-
-  # List packages installed in system profile. To search, run:
-  # $ nix search wget
-   environment.systemPackages = with pkgs; [
-     neovim # Do not forget to add an editor to edit configuration.nix! The Nano editor is also installed by default.
-     wget
-     chrome
-     git
-     neofetch
-     btop
-     vlc # VLC Media Player
-     obs-studio # OBS Studio
-     bluez # Bluetooth tools
-     clash-verge
-     vscode # Visual Studio Code(Unfree software)
-     tdesktop # Telegram Desktop
-     flameshot # Flameshot
-     virt-manager
-     nodejs
-     nodePackages.npm
-     nur.repos.linyinfeng.icalingua-plus-plus # Icalingua++(R.I.P. Icalingua)
-   ];
-
-  # Flatpak
-  services.flatpak.enable = true;
-
-  # NTFS
-  boot.supportedFilesystems = [ "ntfs" ];
-
-  # Some programs need SUID wrappers, can be configured further or are
-  # started in user sessions.
-  # programs.mtr.enable = true;
-  # programs.gnupg.agent = {
-  #   enable = true;
-  #   enableSSHSupport = true;
-  # };
-
-  # List services that you want to enable:
-
-  # Enable the OpenSSH daemon.
-  services.openssh.enable = true;
-
-  # Open ports in the firewall.
-  # networking.firewall.allowedTCPPorts = [ ... ];
-  # networking.firewall.allowedUDPPorts = [ ... ];
-  # Or disable the firewall altogether.
-  # networking.firewall.enable = false;
-
-  # This value determines the NixOS release from which the default
-  # settings for stateful data, like file locations and database versions
-  # on your system were taken. It‘s perfectly fine and recommended to leave
-  # this value at the release version of the first install of this system.
-  # Before changing this value read the documentation for this option
-  # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
-  system.stateVersion = "23.11"; # Did you read the comment?
-
-}