What's the story in the back alley of Jiaozhou Electrical Appliance City?

The story of super sister-in-law in the back alley of Jiaozhou Electrical Appliance City. According to relevant public information, as far as I know, the back alley of Jiaozhou Electrical Appliance City is located in Jiaozhou City, and April-May is the peak season of electrical appliances every year. Electrical stores swarmed and were very lively. In addition, there is the legendary story of "Super Sister-in-law" circulated by local people.