Taking a long weekend in Beijing, a sprawling city of 20 million people, is no mean feat. Trying to pack the nearby Great Wall and Summer Palace into three days is an even tougher call since nobody speaks English, not even the taxi drivers. The only way to get around is to communicate with hand-written addresses provided by your hotel, leaving little room for spontaneity. Fortunately, I had a secret weapon, a personal assistant provided by At Your Side, a tour guide, interpreter, history teacher and PA, rolled into one. Her name was Zoe and she was born, bred and educated in Beijing.