At about 21:00 on April 2, 2022, Zhang Moumou (not wearing a safety helmet) drove a two-wheeled electric vehicle from north to south along Yingli South Street, Zhongwei City, and turned left at a section 50 meters south of the east gate of a certain community. While driving from west to east, he collided with Jing Moumou (wearing a safety helmet) driving a two-wheeled electric vehicle while driving from north to south along Yingli South Street, causing Zhang Moumou's head injury and vehicle damage.