问sudo apt-get更新中的错误

EN

volition@sjb:~/gd/openslide-3.4.1$ sudo apt-get update
Hit:1 http://archive.ubuntukylin.com:10006/ubuntukylin xenial InRelease
Ign:2 http://dl.google.com/linux/chrome/deb stable InRelease                          
Hit:3 http://dl.google.com/linux/chrome/deb stable Release                            
Hit:5 http://cn.archive.ubuntu.com/ubuntu bionic InRelease                            
Ign:6 http://ppa.launchpad.net/hzwhuang/ss-qt5/ubuntu bionic InRelease                
Hit:7 http://cn.archive.ubuntu.com/ubuntu bionic-updates InRelease  
Hit:8 http://security.ubuntu.com/ubuntu bionic-security InRelease
Hit:9 http://cn.archive.ubuntu.com/ubuntu bionic-backports InRelease                  
Err:10 http://ppa.launchpad.net/hzwhuang/ss-qt5/ubuntu bionic Release         
  404  Not Found [IP: 91.189.95.83 80]
Reading package lists... Done
E: The repository 'http://ppa.launchpad.net/hzwhuang/ss-qt5/ubuntu bionic Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.