Ovis-U1 Technical Report. - Guo-Hua Wang; Shanshan Zhao; Xinjie Zhang; Liangfu Cao; Pengxin Zhan; Lunhao Duan; Shiyin Lu; Minghao Fu 004; Xiaohao Chen; Jianshan Zhao; Yang Li; Qing-Guo Chen (CoRR, 2025)