Episode 15 recap: Health product scam.

Yang Defu privately purchased American cockroach powder from Liu Xiaojing. He originally intended to transfer the payment, but Liu Xiaojing insisted on cash. Just after the transaction, they were caught in the act by Wang Yutian. Yang Defu explained that he had heard that American cockroach powder had miraculous effects against cancer, which is why he bought some. When Wang Yutian heard that it was cockroach powder, she had doubts about its price, as she thought it should only cost a few dollars per kilogram, but Liu Meijing was selling it for several hundred.

Liu Meijing was surprised by Wang Yutian's skepticism and quickly claimed that it was medicinal cockroach powder. She emphasized that the breeding environment and hygiene conditions were exceptional. Yang Defu found her explanation reasonable, and she had also researched online to confirm the medicinal value of American cockroach powder before purchasing it. Wang Yutian didn't believe it and insisted on scientific proof, so she took the cockroach powder to conduct an experiment.

Yang Defu was somewhat uncertain about the situation, but Wang Yutian quickly reassured her, claiming that she was good at chemistry experiments during her school days and told Yang Defu to trust her. Liu Xiaojing saw that Wang Yutian seemed knowledgeable and deliberately tested her. Unexpectedly, Wang Yutian accurately identified the chemicals based on Liu Xiaojing's description of the smell and reminded her not to sniff it directly but to fan it with her hand. However, Liu Xiaojing didn't listen and ended up in the hospital after inhaling the smell of toxic substances resembling rotten eggs.

When the principal heard about this incident, he scolded Wang Yutian. To ensure safety, he wore protective clothing and supervised Wang Yutian in the laboratory. After Wang Yutian completed the experiment, none of them detected any odor. It was then revealed that the so-called American cockroach powder was actually just starch. Liu Xiaojing, who had hoarded a room full of the product, promptly reported it to the police. Yang Defu was very grateful to Wang Yutian for helping her recover her losses. Learning that a healthy lifestyle requires early nights and early mornings, she felt it was really challenging.