$ git add https://gitee.com/jdfxrobot_xiangjin/Student-OpenHarmony/raw/e9be486ce9038039cd398d551968096658389243/%E5%9F%BA%E4%BA%8E%E5%BC%80%E6%BA%90%E9%B8%BF%E8%92%99%E7%9A%84%E9%9D%92%E5%B0%91%E5%B9%B4%E5%BC%80%E5%8F%91%E6%9D%BF%E6%9E%84%E6%83%B3%E5%8F%8A%E9%9D%92%E5%B0%91%E5%B9%B4%E5%BC%80%E6%BA%90%E8%AF%BE%E7%A8%8B%E6%A1%86%E6%9E%B6%E6%9E%84%E6%80%9D.pdf