Apology for emergency maintenance

On Monday, March 20, 2023, from approximately 15:10-15:35, maintenance was performed to address the vulnerability in an emergency.
Video materials were not available for study during the above time period.
We apologize for any inconvenience caused.
We are pleased to report that the system has now been restored.
We apologize again for the inconvenience as well as the sudden notice. We appreciate your understanding that this work was necessary for the stable operation of our service.
Thank you for your continued support.