Peking University has introduced the GPT-4 based AI teaching assistant Brainiac Buddy to enhance learning and teaching experiences. Founder Dong Bin, with a background in mathematics and machine learning, aims to improve teaching efficiency. Students can hand over complex materials to the AI assistant, which highlights key content and answers questions, enhancing learning efficiency. Teachers can share lesson plans with the AI to assist in developing teaching strategies, saving time. Brainiac Buddy offers personalized and customized learning experiences, driving progress in the field of education.