A memory from several years ago surfaced in Qi Sinian’s mind. It must have been the summer before Zhong Xiran’s junior year of college, when their two families were on their annual vacation at the villa. The weather was hot, but the mountains offered a cool respite; you still needed a thin cotton blanket for an afternoon nap. When he woke up, Zhong Xiran was gone. Qi Siyan told him she’d gone out