A Chinese IT company is suing Apple in a Shanghai court, claiming the U.S. company’s voice recognition service “Siri” violated its patent.

The Shanghai-based Zhi Zhen Network Technology said that Siri’s voice recognition function infringed on its patent for its invention of a chatting robot system, which it applied for from the Chinese government in 2004.

Local media report that if Zhi Zhen wins, it will ask for compensation that could exceed the 60 million U.S. dollars Apple has agreed to pay Taiwan-based computer monitor maker Proview to settle their "iPad" trademark dispute.