JIANGSU – Raise a knife in front of this robodog, and it will fire a net to restrain you.Trained to respond on its own to more than 200 different scenarios, including identifying suspicious or hostile behaviour, the AI Patrol Net-launch Robot Dog Pro was part of a showcase of hi-tech police tools at the third Public Security Tech Expo held at Lianyungang in China’s eastern province of Jiangsu.The AI Patrol Net-launch Robot Dog Pro releasing a non-lethal net on a hostile subject. ST PHOTO: SHINTARO TAYThe expo, which ran from Sept 7 to 11, showcased what China has in public…