A middle-aged man wanted to find fault with Gu Yan. He said, “I want a cup of hot coffee.”

Gu Yan immediately served him a cup of hot coffee. Unexpectedly, the middle-aged man complained, “It is too hot. How can I drink it? What’s wrong with you!”

Gu Yan apologized at once, “I’m sorry. It’s all my fault. I’ll change it right away.” Gu Yan took the coffee away, changed a warm one and served it to him.

She thought it would be fine this ...