Yu Xin remembers that spring was particularly long.
It was so long that when she thought about it again and again, she always felt that the sun never set on that day. The glass dome of the museum cut the light into pieces and spread it on the granite floor. Yu Wei was walking in front. There was a small ink stain on the back of his school uniform that could not be washed away. She chased after him and patted him. When he turned around, the sun just fell on his left cheek.