Chen Yan, Xu Zhixia, and Gao Yuan made a pushcart for the campus library. On its first fully loaded trial push, however, the noise was harsh and the books slid sideways. After changing the wheels, Chen Yan mistakenly thought it was a success, but commuting student Lin He pointed out that gripping, parking, and taking books were all inconvenient. Facing the pressure of the midterm presentation, the team once again wanted to show only the smoothest section, but ultimately chose to keep the failure and let users participate in adjustments. The teacher agreed to limit the trial, but pressed about maintenance responsibility. The three carried their responsibility to complete the handover, doing something beyond applause completely for the first time.