The 2025 6th China International SAR Symposium (CISS) will be held in China from Oct. 25 to Oct. 27, 2025, hosted by Shanghai Academy of Spaceflight Technology and Northwestern Polytechnical University. The China International SAR Symposium (CISS), which has been held since 2018 and technically co-sponsored by IEEE and IEEE GRSS, is leading international conference dedicated to the SAR technologies and applications and it is mainly held in China. The purpose of CISS 2025 is to bring together leading scientists, researchers and engineers in the fields of SAR technologies and applications, and provide a platform for information exchange, achievement presentation and discussion on a wide variety of SAR topics, representing the latest SAR development.