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Zefeng Ji | Lattice

Zefeng Ji

XPENG Robotics, Project leader

Papers on Lattice

1

Total citations

0

Topics

3

Publication activitypapers/week, last 8 weeks

Research focus

Multimodal Models (1)Reasoning & Chain-of-Thought (1)RLHF & Preference Learning (1)

Frequent co-authors

Peng (1)Lee (1)Yin Zhang (1)Yanglin Zhang (1)

Papers (1)

Jun 29, 2026

2w ago·also Project leader, XPENG Robotics

Be Faithful When Response: Returning Fluent and Grounded Answers for Vision-Language Models Reinforcement Learning

Faithful supervision through a novel warm-start strategy boosts VLM accuracy and stabilizes training by grounding responses in visual evidence.

Peng, Lee, Yin Zhang +8

Multimodal Models Reasoning & Chain-of-Thought RLHF & Preference Learning