All right. Online class is an online course that is learned by electronic devices through the Internet. Online courses are web-based courses. Zhang Qi's online class is good, and the resource utilization rate is maximized. Based on network technology and excellent educational resources in colleges and universities, the best teachers and teaching achievements in colleges and universities are spread to all directions, and the learning method is more flexible. Education and study are not limited by time and space, and students can study anytime and anywhere.