In the summer, the weather is very hot. Mr. Chen is going to make a maintenance for his car. Based on the cost considerations, he chose a car repair shop near his home. I didn't expect the maintenance worker to delay for nearly three hours, which was expected to be solved in one hour, and to charge Mr. Chen for three hours. Mr. Chen feels that such a thing is very "pit father". He also raises doubts about the "working hours" of the fast repair shop, hoping that relevant professionals can answer for him.