Dear deepin friends, in order to ensure version quality of the next update, we're now launching internal testing seeking participation from all members in this team.
Changelog:
1.Upgraded dual kernel version and improved system stability and compatibility
2.Upgraded Window Manager version and optimized user experience
3.Fixed wrong calculation results with mathematical formula of calculator application
4.Fixed downloader exiting bug when downloading, and abnormal status of download task after restarting the software
5.Fixed errors of ui file opening by QtCreator
6.Enlarged searching area of albums, calendars, music and other applications
7.Fixed the problem of failed bookmarks position modification when dragging sidebar bookmarks under file manager
8.Fixed security holes and improved system security
9.Fixed calendar problems of reminding twice occasionally
Testing Schedule
2021.4.23: Commence testing
2021.4.23——2021.4.29: Test and reply in this post, feedback your questions
2021.4.29: End testing
Test Procedure
Connect to internal source and upgrade the system to the latest edition.
Upgrade method:（The internal test version may be unstable. Please do not use it in production environment）
Change the sources, run in terminal:
sudo deepin-editor /etc/apt/sources.list
Paste the following contents to sources.list, then save and exit.
## Generated by deepin-installer
deb [by-hash=force] https://community-packages.deepin.com/deepin/ apricot main contrib non-free
#deb-src https://community-packages.deepin.com/deepin/ apricot main contrib non-free
deb [trusted=yes] https://proposed-packages.deepin.com/dde-apricot unstable main contrib non-free
3、Execute sudo apt-get update && sudo apt-get dist-upgrade command in terminal. After upgrade successful, please reboot your computer.
Test and reply in this post, feedback your questions.
Note:
How to manually upgrade your kernel:sudo apt install linux-image-deepin-stable-amd64 linux-headers-deepin-stable-amd64
Attention
The internal testing is limited to members. Click here to join it?
All members of Internal Testing Team will participate by default
Members who consecutively absent for 3 times without asking for leave, will be dismissed from the Team
Please do not distribute the content and data of the Internal Testing, otherwise will be dismissed from the Team
Acknowledgments
Many thanks to all the Internal Testing Team members for your active participation!
中文 
Dear deepin friends, in order to ensure version quality of the next update, we're now launching internal testing seeking participation from all members in this team.
Changelog:
1. Upgraded dual kernel version and improved system stability and compatibility
2. Upgraded Window Manager version and optimized user experience
3. Fixed wrong calculation results with mathematical formula of calculator application
4. Fixed downloader exiting bug when downloading, and abnormal status of download task after restarting the software
5. Fixed errors of ui file opening by QtCreator
6. Enlarged searching area of albums, calendars, music and other applications
7. Fixed the problem of failed bookmarks position modification when dragging sidebar bookmarks under file manager
8. Fixed security holes and improved system security
9. Fixed calendar problems of reminding twice occasionally
Test Procedure
Upgrade method:（The internal test version may be unstable. Please do not use it in production environment）
sudo deepin-editor /etc/apt/sources.list
3、Execute sudo apt-get update && sudo apt-get dist-upgrade command in terminal. After upgrade successful, please reboot your computer.
Note:
How to manually upgrade your kernel:sudo apt install linux-image-deepin-stable-amd64 linux-headers-deepin-stable-amd64
Attention
Acknowledgments
Many thanks to all the Internal Testing Team members for your active participation!