Xiuyu Li, a graduate of the Turing Class of Renmin University, joined Step Star as a researcher in large-scale model post-training.

According to Bijie.com, Xiuyu Li, a graduate of the Turing Class at Renmin University, has announced that he has joined Stepfun, a domestic large-model vendor, as a large-model post-training researcher. During his time at university, Xiuyu Li focused on research in large-model alignment and reinforcement learning (RL). His academic achievements include the training-free inference-time alignment method ETS, published as a co-first author at ICML 2026, and the paper DART on the conflict between inference and tool invocation in agent reinforcement learning.