It seemed that in general the robot satisfied Mr Jiang's needs.
After a few comfortable weeks, however, things started to go wrong. The robot caught a virus and no longer worked properly. It began to make stupid mistakes. Sometimes it woke Mr Jiang up at four o'clock in the morning. When Mr Jiang got home, he would find his flat in a complete mess: food was laid on the bed; milk was stored in the rubbish bin; coins, bils and his private papers were spread all over the floor. Moreover, the robot moved too fast on its wheels and often knocked things over. Mr Jiang did not know what to do with it. In the end, Mr Jiang decided to return the robot to the robot shop. Robots can help people a lot, but they can also be too much trouble!