code: def keysInfo(lang="en"):
      if lang == "ch":
          msg = (
              "快捷键\t\t\t说明\n"
              "———————————————————————\n"
              "Ctrl + shift + R\t\t对当前图片的所有标记重新识别\n"
              "W\t\t\t新建矩形框\n"
              "Q\t\t\t新建四点框\n"
              "Ctrl + E\t\t编辑所选框标签\n"
              "Ctrl + R\t\t重新识别所选标记\n"
              "Ctrl + C\t\t复制并粘贴选中的标记框\n"
              "Ctrl + 鼠标左键\t\t多选标记框\n"
              "Backspace\t\t删除所选框\n"
              "Ctrl + V\t\t确认本张图片标记\n"
              "Ctrl + Shift + d\t删除本张图片\n"
              "D\t\t\t下一张图片\n"
              "A\t\t\t上一张图片\n"
              "Ctrl++\t\t\t缩小\n"
              "Ctrl--\t\t\t放大\n"
              "↑→↓←\t\t\t移动标记框\n"
              "———————————————————————\n"
              "注：Mac用户Command键替换上述Ctrl键"
          )
  
      else:
          msg = (
              "Shortcut Keys\t\tDescription\n"
              "———————————————————————\n"
              "Ctrl + shift + R\t\tRe-recognize all the labels\n"
              "\t\t\tof the current image\n"
              "\n"
              "W\t\t\tCreate a rect box\n"
              "Q\t\t\tCreate a four-points box\n"
              "Ctrl + E\t\tEdit label of the selected box\n"
              "Ctrl + R\t\tRe-recognize the selected box\n"
              "Ctrl + C\t\tCopy and paste the selected\n"
              "\t\t\tbox\n"
              "\n"
              "Ctrl + Left Mouse\tMulti select the label\n"
              "Button\t\t\tbox\n"
              "\n"
              "Backspace\t\tDelete the selected box\n"
              "Ctrl + V\t\tCheck image\n"
              "Ctrl + Shift + d\tDelete image\n"
              "D\t\t\tNext image\n"
              "A\t\t\tPrevious image\n"
              "Ctrl++\t\t\tZoom in\n"
              "Ctrl--\t\t\tZoom out\n"
              "↑→↓←\t\t\tMove selected box"
              "———————————————————————\n"
              "Notice:For Mac users, use the 'Command' key instead of the 'Ctrl' key"
          )
  
      return msg
  
imports: import hashlib
  import os
  import re
  import sys
  from math import sqrt
  import cv2
  import numpy
  from PyQt5.QtCore import QRegExp, QT_VERSION_STR
  from PyQt5.QtGui import QIcon, QRegExpValidator, QColor
  from PyQt5.QtWidgets import QPushButton, QAction, QMenu
  from libs.ustr import ustr
label_desc: Use image node_id 17 for calling a global function with example usage: keysInfo(lang) and returns: msg