UniF^2ace: A \ underlineUni brace fied \ underlineF brace ine-grained \ underlineFace brace Understanding and Generation Model - Li, Junzhe; Zhou, Sifan; Guo, Liya; Qiu, Xuerui; Xu, Linrui; Long, TingTing; Fan, Chun; Li, Ming; Fan, Hehe; Liu, Jun; YAN, Shuicheng (International Conference on Learning Representations, 2026)