Visual Thoughts: A Unified Perspective of Understanding Multimodal Chain-of-Thought - Cheng, ZIhui; Chen, Qiguang; Xu, Xiao; Wang, Jiaqi; Wang, Weiyun; Fei, Hao; Wang, Yidong; Wang, Alex Jinpeng; Chen, Zhi; Che, Wanxiang; Qin, Libo (Advances in Neural Information Processing Systems, 2025)