Su Qingyuan, a Ph. D. In Physics who returned from studying abroad, brought with him a box of "strange and chaotic" experimental equipment and accidentally became the "special consultant" of the Shanghai Beach Patrol Room. She relied on formulas to solve the case: she used parabolas to calculate the trajectories of jumping off buildings, voiceprint analysis to restore gunshots, and even the depth of the murderer's footprints to calculate the weight. But she always forgot that she was wearing a cheongsam. When she squatted down to pick up evidence, the hem of the skirt opened with a "snap" sound, revealing the Western-style underwear underneath, shocking the onlookers to dislocate their jaws.