Chinese authorities have executed a man convicted of using  poison to kill a billionaire gaming tycoon linked to the Netflix adaptation of "The Three-Body Problem" over a professional dispute, local media reported Tuesday. Xu Yao was found guilty of killing Lin Qi, the founder of the Shanghai-based Yoozoo Games, which holds the film adaptation rights for the blockbuster science-fiction trilogy known by the title of its first book, "The Three-Body Problem." The sci-fi trilogy, by Chinese author