Although Shao Rong decided to go shopping on a whim, it was not a lie she created just to escape. She would have gone shopping anyways, if not now, a little later. Her schedule altered a little but nothing unexpected was added.
Hence, she calmly drove towards the biggest mall in City B to see the local food, culture and others.
A mall can have all the people in the area so she can see how the locals behave. Their behavior, their culture and their hospitality can be seen here. But in addition there is also their hostility, their grudges and their negativity. After all, in the biggest mall, not all the citizens enter to shop. Instead it's the specific group of social classes that enter the mall on a regular basis.
In general, upper-middle class to high class people shop on a regular basis, while others may enter the mall just for 'window shopping'.
Hence, if Shao Rong enters a mall, she can look at a diversity of people here.
