Upon their arrival, they were given new names: Fu Wa became Xing Xing ("prosperity") and Feng Yi became Liang Liang ("pretty"). Few could have predicted just how adored they would become.

HONG KONG — Xin Xing, a giant panda who grew to an age that shattered records, lived a life of great appetites. Born in the wild in a sprawling panda sanctuary in China’s Sichuan Province, she ...