Although Dr. Cheng has had only limited funds to perform experimental implants on animals, and has yet to receive the approval of the U.S. Food and Drug Administration, he confidently says that in concept and structure the Phoenix is not behind the widely used Jarvik model.
雖然鄭國材因財力有限，至今尚未完成足夠數量的動物實驗，連帶地無法通過美國食品藥物管理局（FDA）核准進行人體試驗，但他頗具信心地表示，「鳳凰號」的設計理念與結構，都不亞於目前美國通用的、體積較大的「賈維克號」，只要有足夠的經費及人力，「鳳凰號」的發展潛力非常可觀。