武隆景区起诉《变形金刚4》片方

As the blockbuster film "Transformers: Age of Extinction" dominates box-offices around the world, the film's production companies are facing legal troubles in China.

The Wulong Karst National Park in southwest China's Chongqing municipality has confirmed it is suing Paramount Pictures and the the U.S. studio's Chinese partners, who jointly produced the new "Transformers."

As a UNESCO World Heritage site in Chongqing, the Wulong Park was reported to invest at least one-million dollars to be promoted in the film.

However, the site was not clearly identified with text when it appeared in the movie.

Paramount and its partners in China claim that Wulong Park defaulted on its payment for five months, delaying the film's production cycle.

Being that the two sides could not come to an agreement on the matter, Wulong Park officially filed a legal suit against the two production companies for incurred losses.

The "Transformers" movies have a huge fan base in China. The first three films in the franchise saw huge success at domestic box offices. "Transformers: Dark of the Moon" earned some one-billion yuan in 2011.

As of Monday, "Transformers: Age of Extinction" has raked in over 212 million US dollars in China, encroaching on "Avatar's" 217.7 million-US-dollar record set in 2010.