Apple is facing a lawsuit from a Shanghai company over an alleged patent infringement for use of Siri, according to a report. Shanghai Zhi Zhen Internet Technology Co Ltd is suing Apple, claiming Siri infringes on its patent for Xiaoi, a “chat robot system” — the patent went into effect in 2006, prior to Siri. Xiaoi has been used in many fields, including telecommunications and banking, Shanghai Zhi Zhen has claimed. A pre-hearing is…