Greg Jenner, comedian Ria Lina and Prof Ronald C Po investigate one of the most successful pirates to have ever lived, Zheng Yi Sao. During the 18th century Qing dynasty, she led the most feared army of pirates the world had ever seen - all without a parrot on her shoulder.Research: Will Clayton Script: Emma Nagouse, Will Clayton and Greg Jenner Project Manager: Siefe Miyo Edit Producer: Cornelius MendezA production by The Athletic for BBC Radio 4.