Zhengyu, an Apple engineer, was a devoted husband and father who was “endlessly generous” and got along with everyone effortlessly, Wu said in a fundraiser she started to help the 35-year-old’s family.

“His children looked up to him, and his friends adored him,” Wu said. “He was always the first to show up when anyone needed help — whether it was passing along his kids’ outgrown things to other families, sharing the fish he caught on his fishing trips, or simply lending a hand whenever a friend was in need.”