Why doesn't Suzhou Shengze let people live on the second floor of the restaurant?

The smell of oil smoke is too strong. According to the inquiry of Suzhou local treasure, the second floor of Suzhou Shengze drink has a heavy oil smoke, and long-term residence will have a great impact on the human body, so people are not allowed to live. Shengze town belongs to Wujiang District, Suzhou City, Jiangsu Province, which is located at the southernmost tip of Jiangsu Province and the center of the Yangtze River Delta and Taihu Lake.