Chapter 510: 509. It's quite nonsensical.

"The two do indeed have some differences in appearance; if you look closely, you'll realize that the Ula grass from West Market has a more robust root system..."

Tang Shu's explanation was as academic as ever.

Her tone was calm, and her light, unhurried voice made it easy to be persuaded.

Although she occasionally used specialized terminology during her lecture, it made many non-medical viewers feel as though they were suddenly seeing the light.

[Learned something new.]

[So that's how it is. Noted.]

[Feels like I've taken a walk through West Market. I'd definitely recognize Ula grass if I saw it now.]

[This class should be paired with that herb-picking video. I'm going to rewatch it later; I've gained a different insight.]

[Why am I, a salesperson, listening so intently? Even my university professors didn't get this kind of attention!]