8.5 Dark blue ink
Shu XinYi had visited the convenience store the very next morning, 2 days after coming to this world, but at that time he was looking for a physical set up that Hayden must be using. But this world's technology was not simple, Shu XinYi might have underestimated it.
That night too, Hayden was rushing to the convenience store. She worked as usual, but Shu XinYi obviously wasn't convinced by her timely performance. Shu XinYi observed her for the whole night an only when the clock struck 2 did Shu XinYi finally noticed something. Hayden was working behind the counter, and she currently had no items to cash in, but she was aggressively typing away on the keyboard. Shu XinYi didn't even have to speak when Snow turned the view from behind her back, so Shu XinYi had a full view of the screen.