"Amazing, isn't it? I was quite surprised when I first discovered it! But when I prepared the second piece of bait using exactly the same process, the effect was gone!" Yu Dong shrugged, his tone somewhat complicated.
Zhang Yang didn't rush to respond, frowning as he pondered for over ten seconds before looking up and asking, "What did you do before coming to the site? Did the packaging for the base bait get contaminated with anything? Did you wash your hands before starting the bait experiment? Did you come into contact with anything suspicious?"
The speaker unintentionally made a point, and with Zhang Yang's reminder, Yu Dong patiently went over the details before and after preparing the bait in his mind.
As a professional, the detailed questions Zhang Yang asked had been drilled into Yu Dong many times by his teachers during school experiments. Controlling variables to eliminate external interference is common knowledge in experimental controls.
