1Guest Editor's Commentary前插1-前插32Basic image and dynamic variation processes of planetary ring currentsFu Haobo, Yue ChaoReview371-3823Lunar radiation environment:Measurement and modeling resultsGuo Jingnan, Liu BailiangReview383-3934Comparative study of global simulation methods and characteristics of the space environments of terrestrial planetsLu Haoyu, Zhao Jianing, Wang Jianxuan, Song Yihui, Li Shibang, Chen Nihan, Cao Yuchen, Wang QimengReview394-4265Recent progress in understanding magnetic reconnection in the Martian space environmentXu Xiaojun, Wang Jing, Ye Yudong, Wang Ming, Luo Lei, Xu Qi, Man HengyanReview427-4386Review of the impact of Martian crustal magnetic fields on its atmospheric ion escapeMa Yang, Lu Haoyu, Li ShibangReview439-4527Identification and comparative analysis of polar cusp region at Earth and the giant planetsXu Yan, Yao Zhonghua, Ye Shengyi, Zhang Binzheng, Chen Junjie, Zeng Zhili, Sun JiuwenReview453-4738Energetic particle environment of Jupiter's radiation beltsCao Xing, Wang Shaobei, Teng Shangchun, Hu Yanqi, Long Minyi, Lu Peng, Ni BinbinReview474-489