Great traders leave nothing to chance. They have well-developed strategies about what their next step should be. What should be imported at a certain point and what should be marketed, but also how. Good promotion is the key to success, while bad promotion can destroy an entire business. Ming and her father, the rich merchant Cheng, quite often attend the huge trade markets that are organized on the Great Wall of China. The Great Wall of China is a well-known place where valuable items are traded, and every trader who trades in such goods wants to be a part of this market. Ming, here, often finds valuable items that she can sell so she earns a lot of money.