- The version number counting rule of openEuler is changed from openEuler x.x to openEuler year.month. For example, openEuler 21.03 indicates that the version is released in March 2020.
- The Python core team has stopped maintaining Python 2 in January 2020. Python 2 reached end of maintenance (EOM) on December 31, 2020. In 2021, openEuler 21.09 fixed only the critical CVEs related to Python 2. Please switch to Python 3 as soon as possible.