It is with profound sadness and a heavy heart that we convey the news of the passing of Professor Jun Sun. Professor Sun departed peacefully due to illness at 21:58 on March 1, 2024, at Zhongshan Hospital in Shanghai, at the age of 98.

The ISRM owes Professor Sun a lot from his enormous and constant dedication to the Society during many years, as the Vice President at large from 1995 to 1999, as well as a Fellow of ISRM from 2015.

Professor Sun's lifelong commitment to teaching, research, and engineering applications in geomechanics, tunneling, and underground engineering has left an indelible mark on our community. His leadership and contributions will be remembered with deep respect and gratitude.

During this challenging time, our thoughts and condolences go out to Professor Sun's family, friends, and colleagues. We share in the grief of his loss and celebrate the profound impact he had on the global rock mechanics community.