Yu Sheng earnestly introduced Little Red Riding Hood and the long-haired princess to his construction plans in the valley, which included the grand Great Temple he envisioned and a series of subsidiary buildings that would be built around the platform—although he wasn't quite sure what those buildings would be used for, the idea was to build them first and figure it out later—then he casually explained why the square house next to the platform wasn't a restroom.
The two girls listened very seriously, especially when they tried to hold back their laughter in the second half.
Yu Sheng also felt helpless about this—because he too thought the first phase of the construction did look a bit like a restroom...
He could only awkwardly end the topic and tried to divert his guests' attention.