She wondered if his mother, who had set up their date, had told him about that.Siyu was thirty-eight, and the man, Hanfeng, was forty-four. Siyu’s father, after supporting her through college, had remarried, choosing a woman thirty years his junior. The woman had a young son from her previous marriage, whom Siyu’s father had taken on as his responsibility. The boy was now in his last year of high school, and Siyu, having told her father many times that he deserved peace and simplicity, maintained a respectful distance from his new family. Each year she spent New Year’s Eve, and sometimes other holidays, with Hanfeng’s mother, who had been her zoology professor in college. There was no way to predict when the older woman would be in the mood to invite Siyu, so she tried to keep herself uncommitted, which meant that most of the holidays she spent alone.“Professor Dai must miss her students these days,” Siyu said after she and Hanfeng had exchanged greetings, although she knew it was not the students that his mother missed but the white skulls of mammals and birds on her office shelves, the drawers filled with scalpels and clamps and tweezers that she had cleaned and maintained with care, and the fact that she could mask her indifference to the human species with her devotion to animals.