Beijing Hexadecimal Technology Co., Ltd.'s 'Educational Brain' big data platform has successfully served over 2,800 schools across the country, amassing an impressive 1.5PB of teaching behavior data. This platform not only facilitates the sharing of high-quality educational resources in remote areas but also effectively bridges the educational divide between urban and rural regions, as well as among schools, through data-driven methodologies. It transforms the notion of personalized teaching from a mere ideal into a tangible reality, enabling education to revert to its core mission of 'educating people' through technological enhancement. Furthermore, Hexadecimal has showcased a sustainable trajectory for technology application, wherein AI technology slashes teachers' lesson preparation time from 3 hours to just 30 minutes, allowing them to dedicate more energy to teaching innovation. Concurrently, AI essay grading efficiency has soared by 18 times, markedly elevating the quality of teacher-student interactions.