Yebin Liu

ORCID

Publication Activity (10 Years)

Years Active: 2006-2024
Publications (10 Years): 190

Top Venues

CoRR

CVPR

ICCV

IEEE Trans. Pattern Anal. Mach. Intell.

Publications

Yun Liu, Haolin Yang, Xu Si, Ling Liu, Zipeng Li, Yuxiang Zhang, Yebin Liu, Li Yi
TACO: Benchmarking Generalizable Bimanual Tool-ACtion-Object Understanding. CoRR (2024)
Xiaochen Zhao, Lizhen Wang, Jingxiang Sun, Hongwen Zhang, Jinli Suo, Yebin Liu
HAvatar: High-fidelity Head Avatar via Facial Model Conditioned Neural Radiance Field. ACM Trans. Graph. 43 (1) (2024)
Jingxiang Sun, Bo Zhang, Ruizhi Shao, Lizhen Wang, Wen Liu, Zhenda Xie, Yebin Liu
DreamCraft3D: Hierarchical 3D Generation with Bootstrapped Diffusion Prior. CoRR (2023)
Shunyuan Zheng, Boyao Zhou, Ruizhi Shao, Boning Liu, Shengping Zhang, Liqiang Nie, Yebin Liu
GPS-Gaussian: Generalizable Pixel-wise 3D Gaussian Splatting for Real-time Human Novel View Synthesis. CoRR (2023)
Zhe Li, Zerong Zheng, Yuxiao Liu, Boyao Zhou, Yebin Liu
PoseVocab: Learning Joint-structured Pose Embeddings for Human Avatar Modeling. SIGGRAPH (Conference Paper Track) (2023)
Zhe Li, Zerong Zheng, Yuxiao Liu, Boyao Zhou, Yebin Liu
PoseVocab: Learning Joint-structured Pose Embeddings for Human Avatar Modeling. CoRR (2023)
Jiajun Zhang, Yuxiang Zhang, Hongwen Zhang, Boyao Zhou, Ruizhi Shao, Zonghai Hu, Yebin Liu
Ins-HOI: Instance Aware Human-Object Interactions Recovery. CoRR (2023)
Zerong Zheng, Xiaochen Zhao, Hongwen Zhang, Boning Liu, Yebin Liu
AvatarReX: Real-time Expressive Full-body Avatars. ACM Trans. Graph. 42 (4) (2023)
Yingzhi Tang, Qijian Zhang, Junhui Hou, Yebin Liu
Human as Points: Explicit Point-based 3D Human Reconstruction from Single-view RGB Images. CoRR (2023)
Haibiao Xuan, Xiongzheng Li, Jinsong Zhang, Hongwen Zhang, Yebin Liu, Kun Li
Narrator: Towards Natural Control of Human-Scene Interaction Generation via Relationship Reasoning. CoRR (2023)
Yuelang Xu, Benwang Chen, Zhe Li, Hongwen Zhang, Lizhen Wang, Zerong Zheng, Yebin Liu
Gaussian Head Avatar: Ultra High-fidelity Head Avatar via Dynamic Gaussians. CoRR (2023)
Zhaoqi Su, Liangxiao Hu, Siyou Lin, Hongwen Zhang, Shengping Zhang, Justus Thies, Yebin Liu
CaPhy: Capturing Physical Properties for Animatable Human Avatars. CoRR (2023)
Zerong Zheng, Xiaochen Zhao, Hongwen Zhang, Boning Liu, Yebin Liu
AvatarReX: Real-time Expressive Full-body Avatars. CoRR (2023)
Jinsong Zhang, Minjie Zhu, Yuxiang Zhang, Yebin Liu, Kun Li
SpeechAct: Towards Generating Whole-body Motion from Speech. CoRR (2023)
Ruizhi Shao, Jingxiang Sun, Cheng Peng, Zerong Zheng, Boyao Zhou, Hongwen Zhang, Yebin Liu
Control4D: Dynamic Portrait Editing by Learning 4D GAN from 2D Diffusion-based Editor. CoRR (2023)
Zhaoqi Su, Liangxiao Hu, Siyou Lin, Hongwen Zhang, Shengping Zhang, Justus Thies, Yebin Liu
CaPhy: Capturing Physical Properties for Animatable Human Avatars. ICCV (2023)
Kai Jia, Hongwen Zhang, Liang An, Yebin Liu
Delving Deep into Pixel Alignment Feature for Accurate Multi-View Human Mesh Recovery. AAAI (2023)
Yuelang Xu, Lizhen Wang, Xiaochen Zhao, Hongwen Zhang, Yebin Liu
AvatarMAV: Fast 3D Head Avatar Reconstruction Using Motion-Aware Neural Voxels. SIGGRAPH (Conference Paper Track) (2023)
Yibo Xia, Lizhen Wang, Xiang Deng, Xiaoyan Luo, Yebin Liu
GMTalker: Gaussian Mixture based Emotional talking video Portraits. CoRR (2023)
Yuxiang Zhang, Hongwen Zhang, Liangxiao Hu, Hongwei Yi, Shengping Zhang, Yebin Liu
Real-time Monocular Full-body Capture in World Space via Sequential Proxy-to-Motion Learning. CoRR (2023)
Yuelang Xu, Hongwen Zhang, Lizhen Wang, Xiaochen Zhao, Han Huang, Guojun Qi, Yebin Liu
LatentAvatar: Learning Latent Expression Code for Expressive Neural Head Avatar. SIGGRAPH (Conference Paper Track) (2023)
Zhaoqi Su, Tao Yu, Yangang Wang, Yebin Liu
DeepCloth: Neural Garment Representation for Shape and Style Editing. IEEE Trans. Pattern Anal. Mach. Intell. 45 (2) (2023)
Yuelang Xu, Hongwen Zhang, Lizhen Wang, Xiaochen Zhao, Han Huang, Guojun Qi, Yebin Liu
LatentAvatar: Learning Latent Expression Code for Expressive Neural Head Avatar. CoRR (2023)
Lizhen Wang, Xiaochen Zhao, Jingxiang Sun, Yuxiang Zhang, Hongwen Zhang, Tao Yu, Yebin Liu
StyleAvatar: Real-time Photo-realistic Portrait Avatar from a Single Video. CoRR (2023)
Haibiao Xuan, Xiongzheng Li, Jinsong Zhang, Hongwen Zhang, Yebin Liu, Kun Li
Narrator: Towards Natural Control of Human-Scene Interaction Generation via Relationship Reasoning. ICCV (2023)
Xin Huang, Ruizhi Shao, Qi Zhang, Hongwen Zhang, Ying Feng, Yebin Liu, Qing Wang
HumanNorm: Learning Normal Diffusion Model for High-quality and Realistic 3D Human Generation. CoRR (2023)
Junxing Hu, Hongwen Zhang, Zerui Chen, Mengcheng Li, Yunlong Wang, Yebin Liu, Zhenan Sun
Learning Explicit Contact for Implicit Reconstruction of Hand-held Objects from Monocular Images. CoRR (2023)
Jingxiang Sun, Xuan Wang, Lizhen Wang, Xiaoyu Li, Yong Zhang, Hongwen Zhang, Yebin Liu
Next3D: Generative Neural Texture Rasterization for 3D-Aware Head Avatars. CVPR (2023)
Xiangwen Deng, Yufeng Wang, Yuanhao Cai, Jingxiang Sun, Yebin Liu, Haoqian Wang
ITportrait: Image-Text Coupled 3D Portrait Domain Adaptation. CoRR (2023)
Yating Tian, Hongwen Zhang, Yebin Liu, Limin Wang
Recovering 3D Human Mesh From Monocular Images: A Survey. IEEE Trans. Pattern Anal. Mach. Intell. 45 (12) (2023)
Ruizhi Shao, Zerong Zheng, Hanzhang Tu, Boning Liu, Hongwen Zhang, Yebin Liu
Tensor4D: Efficient Neural 4D Decomposition for High-Fidelity Dynamic Reconstruction and Rendering. CVPR (2023)
Siyou Lin, Boyao Zhou, Zerong Zheng, Hongwen Zhang, Yebin Liu
Leveraging Intrinsic Properties for Non-Rigid Garment Alignment. ICCV (2023)
Hongwen Zhang, Siyou Lin, Ruizhi Shao, Yuxiang Zhang, Zerong Zheng, Han Huang, Yandong Guo, Yebin Liu
CloSET: Modeling Clothed Humans on Continuous Surface with Explicit Template Decomposition. CVPR (2023)
Lizhen Wang, Xiaochen Zhao, Jingxiang Sun, Yuxiang Zhang, Hongwen Zhang, Tao Yu, Yebin Liu
StyleAvatar: Real-time Photo-realistic Portrait Avatar from a Single Video. SIGGRAPH (Conference Paper Track) (2023)
Kai Jia, Hongwen Zhang, Liang An, Yebin Liu
Delving Deep into Pixel Alignment Feature for Accurate Multi-view Human Mesh Recovery. CoRR (2023)
Hongwen Zhang, Yating Tian, Yuxiang Zhang, Mengcheng Li, Liang An, Zhenan Sun, Yebin Liu
PyMAF-X: Towards Well-Aligned Full-Body Model Regression From Monocular Images. IEEE Trans. Pattern Anal. Mach. Intell. 45 (10) (2023)
Yi Wang, Jian Ma, Ruizhi Shao, Qiao Feng, Yu-Kun Lai, Yebin Liu, Kun Li
HumanCoser: Layered 3D Human Generation via Semantic-Aware Diffusion Model. CoRR (2023)
Hongwen Zhang, Siyou Lin, Ruizhi Shao, Yuxiang Zhang, Zerong Zheng, Han Huang, Yandong Guo, Yebin Liu
CloSET: Modeling Clothed Humans on Continuous Surface with Explicit Template Decomposition. CoRR (2023)
Xiaochen Zhao, Jingxiang Sun, Lizhen Wang, Yebin Liu
InvertAvatar: Incremental GAN Inversion for Generalized Head Avatars. CoRR (2023)
He Zhang, Fan Li, Jianhui Zhao, Chao Tan, Dongming Shen, Yebin Liu, Tao Yu
Controllable Free Viewpoint Video Reconstruction Based on Neural Radiance Fields and Motion Graphs. IEEE Trans. Vis. Comput. Graph. 29 (12) (2023)
Yufan Chen, Lizhen Wang, Qijing Li, Hongjiang Xiao, Shengping Zhang, Hongxun Yao, Yebin Liu
MonoGaussianAvatar: Monocular Gaussian Point-based Head Avatar. CoRR (2023)
Minghan Qin, Yifan Liu, Yuelang Xu, Xiaochen Zhao, Yebin Liu, Haoqian Wang
High-Fidelity 3D Head Avatars Reconstruction through Spatially-Varying Expression Conditioned Neural Radiance Field. CoRR (2023)
Chenming Han, Ruizhi Shao, Gaochang Wu, Hang Shao, Yebin Liu
ViT-MPI: Vision Transformer Multiplane Images for Surgical Single-View View Synthesis. CICAI (1) (2023)
Siyou Lin, Boyao Zhou, Zerong Zheng, Hongwen Zhang, Yebin Liu
Leveraging Intrinsic Properties for Non-Rigid Garment Alignment. CoRR (2023)
Zhe Li, Zerong Zheng, Lizhen Wang, Yebin Liu
Animatable Gaussians: Learning Pose-dependent Gaussian Maps for High-fidelity Human Avatar Modeling. CoRR (2023)
Xiaochen Zhao, Lizhen Wang, Jingxiang Sun, Hongwen Zhang, Jinli Suo, Yebin Liu
HAvatar: High-fidelity Head Avatar via Facial Model Conditioned Neural Radiance Field. CoRR (2023)
Hao Sheng, Yebin Liu, Jingyi Yu, Gaochang Wu, Wei Xiong, Ruixuan Cong, Rongshan Chen, Longzhao Guo, Yanlin Xie, Shuo Zhang, Song Chang, Youfang Lin, Wentao Chao, Xuechun Wang, Guanghui Wang, Fuqing Duan, Tun Wang, Da Yang, Zhenglong Cui, Sizhe Wang, Mingyuan Zhao, Qiong Wang, Qianyu Chen, Zhengyu Liang, Yingqian Wang, Jungang Yang, Xueting Yang, Junli Deng
LFNAT 2023 Challenge on Light Field Depth Estimation: Methods and Results. CVPR Workshops (2023)
Zhaoqi Su, Weilin Wan, Tao Yu, Lingjie Liu, Lu Fang, Wenping Wang, Yebin Liu
MulayCap: Multi-Layer Human Performance Capture Using a Monocular Video Camera. IEEE Trans. Vis. Comput. Graph. 28 (4) (2022)
Zerong Zheng, Tao Yu, Yebin Liu, Qionghai Dai
PaMIR: Parametric Model-Conditioned Implicit Representation for Image-Based Human Reconstruction. IEEE Trans. Pattern Anal. Mach. Intell. 44 (6) (2022)
Zhe Li, Zerong Zheng, Hongwen Zhang, Chaonan Ji, Yebin Liu
AvatarCap: Animatable Avatar Conditioned Monocular Human Volumetric Capture. ECCV (1) (2022)
Ruizhi Shao, Zerong Zheng, Hongwen Zhang, Jingxiang Sun, Yebin Liu
DiffuStereo: High Quality Human Reconstruction via Diffusion-based Stereo Using Sparse Cameras. CoRR (2022)
Yang Zheng, Yanchao Yang, Kaichun Mo, Jiaman Li, Tao Yu, Yebin Liu, C. Karen Liu, Leonidas J. Guibas
GIMO: Gaze-Informed Human Motion Prediction in Context. CoRR (2022)
Tao Hu, Tao Yu, Zerong Zheng, He Zhang, Yebin Liu, Matthias Zwicker
HVTR: Hybrid Volumetric-Textural Rendering for Human Avatars. 3DV (2022)
Jingying Liu, Binyuan Hui, Kun Li, Yunke Liu, Yu-Kun Lai, Yuxiang Zhang, Yebin Liu, Jing-Yu Yang
Geometry-Guided Dense Perspective Network for Speech-Driven Facial Animation. IEEE Trans. Vis. Comput. Graph. 28 (12) (2022)
Zhe Li, Zerong Zheng, Hongwen Zhang, Chaonan Ji, Yebin Liu
AvatarCap: Animatable Avatar Conditioned Monocular Human Volumetric Capture. CoRR (2022)
Yang Zheng, Yanchao Yang, Kaichun Mo, Jiaman Li, Tao Yu, Yebin Liu, C. Karen Liu, Leonidas J. Guibas
GIMO: Gaze-Informed Human Motion Prediction in Context. ECCV (13) (2022)
Siyou Lin, Hongwen Zhang, Zerong Zheng, Ruizhi Shao, Yebin Liu
Learning Implicit Templates for Point-Based Clothed Human Modeling. CoRR (2022)
Yuelang Xu, Lizhen Wang, Xiaochen Zhao, Hongwen Zhang, Yebin Liu
ManVatar : Fast 3D Head Avatar Reconstruction Using Motion-Aware Neural Voxels. CoRR (2022)
Jingxiang Sun, Xuan Wang, Yong Zhang, Xiaoyu Li, Qi Zhang, Yebin Liu, Jue Wang
FENeRF: Face Editing in Neural Radiance Fields. CVPR (2022)
Lizhen Wang, Zhiyuan Chen, Tao Yu, Chenguang Ma, Liang Li, Yebin Liu
FaceVerse: a Fine-grained and Detail-controllable 3D Face Morphable Model from a Hybrid Dataset. CoRR (2022)
Chaonan Ji, Tao Yu, Kaiwen Guo, Jingxin Liu, Yebin Liu
Geometry-aware Single-image Full-body Human Relighting. CoRR (2022)
Chaonan Ji, Tao Yu, Kaiwen Guo, Jingxin Liu, Yebin Liu
Geometry-Aware Single-Image Full-Body Human Relighting. ECCV (16) (2022)
Qiao Feng, Yebin Liu, Yu-Kun Lai, Jingyu Yang, Kun Li
FOF: Learning Fourier Occupancy Field for Monocular Real-time Human Reconstruction. CoRR (2022)
Ruizhi Shao, Zerong Zheng, Hanzhang Tu, Boning Liu, Hongwen Zhang, Yebin Liu
Tensor4D : Efficient Neural 4D Decomposition for High-fidelity Dynamic Reconstruction and Rendering. CoRR (2022)
Yuemei Zhou, Tao Yu, Zerong Zheng, Ying Fu, Yebin Liu
ProbNVS: Fast Novel View Synthesis with Learned Probability-Guided Sampling. CoRR (2022)
Mengcheng Li, Liang An, Hongwen Zhang, Lianpeng Wu, Feng Chen, Tao Yu, Yebin Liu
Interacting Attention Graph for Single Image Two-Hand Reconstruction. CVPR (2022)
Zerong Zheng, Han Huang, Tao Yu, Hongwen Zhang, Yandong Guo, Yebin Liu
Structured Local Radiance Fields for Human Avatar Modeling. CoRR (2022)
Xiaochen Zhao, Zerong Zheng, Chaonan Ji, Zhenyi Liu, Siyou Lin, Tao Yu, Jinli Suo, Yebin Liu
VERTEX: VEhicle Reconstruction and TEXture Estimation from a Single Image Using Deep Implicit Semantic Template Mapping. CICAI (1) (2022)
Lizhen Wang, Zhiyuan Chen, Tao Yu, Chenguang Ma, Liang Li, Yebin Liu
FaceVerse: a Fine-grained and Detail-controllable 3D Face Morphable Model from a Hybrid Dataset. CVPR (2022)
Ruizhi Shao, Zerong Zheng, Hongwen Zhang, Jingxiang Sun, Yebin Liu
DiffuStereo: High Quality Human Reconstruction via Diffusion-Based Stereo Using Sparse Cameras. ECCV (32) (2022)
Yating Tian, Hongwen Zhang, Yebin Liu, Limin Wang
Recovering 3D Human Mesh from Monocular Images: A Survey. CoRR (2022)
Zhe Li, Tao Yu, Zerong Zheng, Yebin Liu
Robust and Accurate 3D Self-Portraits in Seconds. IEEE Trans. Pattern Anal. Mach. Intell. 44 (11) (2022)
Jingxiang Sun, Xuan Wang, Yichun Shi, Lizhen Wang, Jue Wang, Yebin Liu
IDE-3D: Interactive Disentangled Editing for High-Resolution 3D-aware Portrait Synthesis. CoRR (2022)
Ruizhi Shao, Liliang Chen, Zerong Zheng, Hongwen Zhang, Yuxiang Zhang, Han Huang, Yandong Guo, Yebin Liu
FloRen: Real-time High-quality Human Performance Rendering via Appearance Flow Using Sparse RGB Cameras. SIGGRAPH Asia (2022)
Siyou Lin, Hongwen Zhang, Zerong Zheng, Ruizhi Shao, Yebin Liu
Learning Implicit Templates for Point-Based Clothed Human Modeling. ECCV (3) (2022)
Qiao Feng, Yebin Liu, Yu-Kun Lai, Jingyu Yang, Kun Li
FOF: Learning Fourier Occupancy Field for Monocular Real-time Human Reconstruction. NeurIPS (2022)
Jingxiang Sun, Xuan Wang, Lizhen Wang, Xiaoyu Li, Yong Zhang, Hongwen Zhang, Yebin Liu
Next3D: Generative Neural Texture Rasterization for 3D-Aware Head Avatars. CoRR (2022)
Ruizhi Shao, Hongwen Zhang, He Zhang, Mingjia Chen, Yanpei Cao, Tao Yu, Yebin Liu
DoubleField: Bridging the Neural Surface and Radiance Fields for High-fidelity Human Reconstruction and Rendering. CVPR (2022)
Zerong Zheng, Han Huang, Tao Yu, Hongwen Zhang, Yandong Guo, Yebin Liu
Structured Local Radiance Fields for Human Avatar Modeling. CVPR (2022)
Mengcheng Li, Liang An, Hongwen Zhang, Lianpeng Wu, Feng Chen, Tao Yu, Yebin Liu
Interacting Attention Graph for Single Image Two-Hand Reconstruction. CoRR (2022)
Gaochang Wu, Yuemei Zhou, Yebin Liu, Lu Fang, Tianyou Chai
Geo-NI: Geometry-aware Neural Interpolation for Light Field Rendering. CoRR (2022)
Qiao Feng, Yebin Liu, Yu-Kun Lai, Jing-Yu Yang, Kun Li
Monocular Real-Time Human Geometry Reconstruction. CICAI (3) (2022)
Hongwen Zhang, Yating Tian, Yuxiang Zhang, Mengcheng Li, Liang An, Zhenan Sun, Yebin Liu
PyMAF-X: Towards Well-aligned Full-body Model Regression from Monocular Images. CoRR (2022)
Gaochang Wu, Yebin Liu, Lu Fang, Tianyou Chai
Revisiting Light Field Rendering With Deep Anti-Aliasing Neural Network. IEEE Trans. Pattern Anal. Mach. Intell. 44 (9) (2022)
Jingxiang Sun, Xuan Wang, Yichun Shi, Lizhen Wang, Jue Wang, Yebin Liu
IDE-3D: Interactive Disentangled Editing for High-Resolution 3D-Aware Portrait Synthesis. ACM Trans. Graph. 41 (6) (2022)
Hao Zhao, Jinsong Zhang, Yu-Kun Lai, Zerong Zheng, Yingdi Xie, Yebin Liu, Kun Li
High-Fidelity Human Avatars from a Single RGB Camera. CVPR (2022)
Yang Zheng, Ruizhi Shao, Yuxiang Zhang, Tao Yu, Zerong Zheng, Qionghai Dai, Yebin Liu
DeepMultiCap: Performance Capture of Multiple Characters Using Sparse Multiview Cameras. ICCV (2021)
Zhe Li, Tao Yu, Zerong Zheng, Kaiwen Guo, Yebin Liu
POSEFusion: Pose-Guided Selective Fusion for Single-View Human Volumetric Capture. CVPR (2021)
Ruizhi Shao, Hongwen Zhang, He Zhang, Yanpei Cao, Tao Yu, Yebin Liu
DoubleField: Bridging the Neural Surface and Radiance Fields for High-fidelity Human Rendering. CoRR (2021)
Gaochang Wu, Yingqian Wang, Yebin Liu, Lu Fang, Tianyou Chai
Spatial-Angular Attention Network for Light Field Reconstruction. IEEE Trans. Image Process. 30 (2021)
Lan Xu, Wei Cheng, Kaiwen Guo, Lei Han, Yebin Liu, Lu Fang
FlyFusion: Realtime Dynamic Scene Reconstruction Using a Flying Depth Camera. IEEE Trans. Vis. Comput. Graph. 27 (1) (2021)
Zerong Zheng, Tao Yu, Qionghai Dai, Yebin Liu
Deep Implicit Templates for 3D Shape Representation. CVPR (2021)
Tao Yu, Zerong Zheng, Kaiwen Guo, Pengpeng Liu, Qionghai Dai, Yebin Liu
Function4D: Real-time Human Volumetric Capture from Very Sparse Consumer RGBD Sensors. CoRR (2021)
Jingxiang Sun, Xuan Wang, Yong Zhang, Xiaoyu Li, Qi Zhang, Yebin Liu, Jue Wang
FENeRF: Face Editing in Neural Radiance Fields. CoRR (2021)
Zhiyang Yu, Yu Zhang, Deyuan Liu, Dongqing Zou, Xijun Chen, Yebin Liu, Jimmy S. Ren
Training Weakly Supervised Video Frame Interpolation with Events. ICCV (2021)
Gaochang Wu, Yebin Liu, Lu Fang, Qionghai Dai, Tianyou Chai
Light Field Reconstruction Using Convolutional Network on EPI and Extended Applications. CoRR (2021)
Hongwen Zhang, Yating Tian, Xinchi Zhou, Wanli Ouyang, Yebin Liu, Limin Wang, Zhenan Sun
PyMAF: 3D Human Pose and Shape Regression with Pyramidal Mesh Alignment Feedback Loop. ICCV (2021)
Hongman Wang, Hui Qiao, Jingyu Lin, Rihui Wu, Yebin Liu, Qionghai Dai
Model Study of Transient Imaging With Multi-Frequency Time-of-Flight Sensors. IEEE Trans. Pattern Anal. Mach. Intell. 43 (10) (2021)
Yuxiang Zhang, Zhe Li, Liang An, Mengcheng Li, Tao Yu, Yebin Liu
Lightweight Multi-person Total Motion Capture Using Sparse Multi-view Cameras. CoRR (2021)
Ruizhi Shao, Gaochang Wu, Yuemei Zhou, Ying Fu, Lu Fang, Yebin Liu
LocalTrans: A Multiscale Local Transformer Network for Cross-Resolution Homography Estimation. ICCV (2021)

Yebin Liu.css-eqlu8i{font-size:small;padding-left:4px;}

Publication Activity (10 Years)

Top Topics

Top Venues

Yebin Liu