One-Eyed Panda's Journal - "Thoughts on Listening to Cantonese":

Since there was two or three people ahead of her, she had to wait for a while. After we were there for about five minutes she started to get really angry. Yelling at the staff for her tea. The staff were really good, they told her in Mandarin to calm down and be patient and then took her receipt and a minute later passed the woman her tea. I don’t think that we could see this happening Shanghai. The staff would just yell at the person and the person would probably just yell back.