It's good to give lectures on the platform of Qingbei Daoyuan. Flat-panel lectures at Daoyuan in the north of Qing Dynasty are an online education method, which uses high-definition flat-panel computers to teach, and combines multimedia technology and Internet technology to realize distance teaching and interactive learning. The advantage of this teaching method is that it can break through the geographical restrictions and let more students get high-quality educational resources. Daoyuan Pingjiang is an online education platform jointly launched by Tsinghua University and Beijing Yulu Education Group, aiming at providing high-quality educational resources and learning environment for primary and secondary school students. The course content of the platform covers Chinese, mathematics, English, physics, chemistry, biology and other disciplines. The lecturers are from famous schools such as Tsinghua University, and they have rich teaching experience and professional knowledge.