Due to the fact that the actual energy consumption of the air conditioner did not match its label, Ms. Li, a consumer from Zhuhai City, Guangdong Province, recently filed a lawsuit against the air conditioner manufacturer. This seemingly insignificant minor case is the first officially accepted lawsuit on energy efficiency labeling since China implemented the air conditioner energy efficiency labeling system in 2005. It has been called the "First Case of China's Air Conditioner Energy Efficiency Labeling" by people in the legal field.