Sheng Shushu: "..."
Before her grandfather and Ren Yanjing returned, Sheng Shushu had left the room.
Xiao Yu naturally followed her with long, brisk strides, not clinging to the young girl whose face clearly indicated she didn't want to deal with him that day, but instead, went to work on the blackboard in the living room.
Sheng Shushu watched him pick up the chalk and, with a few swift strokes, write something she couldn't make out.
It wasn't until her grandfather came back in with Ren Yanjing that they saw what Xiao Yu had written and seemed quite surprised.
"Professor Xiao, you figured it out so quickly?"
Sheng Shushu was over in the dining area, a bit too far from the living room and the direction of the balcony.
Her grandfather's house had an overall rectangular layout, with the kitchen, dining room, and living room all in a straight line leading to the balcony. Two bedrooms and a bathroom were situated side by side on one long side of the rectangle.