Three months after the reunion.
For the first time, she walked into the site of an old house renovation project that he was independently responsible for.
Construction was still going on inside, and light leaked in through the half-removed partitions. He handed her a stack of drawings, which were detailed drawings of the light well, and asked her to confirm the elevation of the flower arrangements.
She turned to the last page. Not construction drawings.
It's a hand-drawn pencil sketch. The paper is slightly old and has fold marks on the edges.
What is drawn is a hexahedron. Three of the surfaces are cut open, and fine lines are used inside to create a transition of light and shadow. In the lower right corner are her initials and the date - that Wednesday eight years ago.
That was the three-dimensional geometry problem that she couldn't get right.
He turned it into a real building.
The original light well of the old bungalow was narrow and shadowy, so he added a set of precisely angled folding reflectors to his renovation plan. The mark on the drawing reads: After three times of refraction of sunlight in winter, the indoor greenhouse will be extended for 2 hours and 17 minutes of sunlight every day.
2 Hours and 17 minutes. It's the winter of high school, the time from when the school bell rings to when evening self-study begins. They always shared a pair of headphones during that time, her left ear, his right.
"I have been solving this problem for eight years.
The auxiliary line is correct.
Just draw a little slower. "
Purpose: True love will never make you doubt whether you are worth it