--FILE--Poster of Chinese cartoon movie "The Autobots" Walt Disney Co has taken three Chinese firms to court over concerns local animation "The Autobots" copied elements from Disney's own hit movie "Cars", as the U.S. firm looks to protect its drive into the world's second-largest economy. A court in Shanghai held a hearing on Tuesday (21 June 2016), a Disney spokeswoman said. The dispute was over "copyright infringement" and "unfair competition", according to a notice on the Shanghai Pudong New Area People's Court website. Disney is making a major push into China with the recent opening of a $5.5 billion theme park in Shanghai, its first on the mainland, while its animated movies including "Zootopia" and "Big Hero 6" have been big box office hits in the country. "The Autobots" drew ire from netizens in China when it was released in 2015, with some pointing out similarities with Disney's 2006 film "Cars" starring Owen Wilson and its sequel in 2011. "Cars 3" is penciled in to be released in 2017.