A high honor awarded by the American Physical Society, APS Fellows are elected based on "outstanding physics research, important applications of physics, leadership in or service to physics, or significant contributions to physics education". Specifically, Bing Zhang was recognized
"for his significant scientific contributions to the understanding of the physical mechanisms of high-energy astrophysical sources, especially the prompt emission and afterglows of cosmological gamma-ray bursts."
All 2014 APS Fellows, along with Bing's entry, can be seen
here.