A British tourist is visiting a Chinese family. The Chinese host

A British tourist is visiting a Chinese family. The Chinese hostess introduces herself and her husband to guest.
Chinese hostess: Welcome to my home. My name is Cai Hong, and this is my husband.
British tourist: Thank you, Mrs. Cai. It's a pleasure to meet you, Mrs.Cai. I'm Lucy Taylor.
Chinese hostess: Have a seat, Madam Lucy.
Question: What went wrong in the case and Why?
【正确答案】：The British tourist thinks that Cai Hong's surname is her husband's surname, since she is unaware of the fact that in China women still use their own surname after marriage. Cai Hong thinks that 'madam’ is a respectful term of address for any female English-speaker, unaware of the fact that in Britain it is usually used by someone who is providing a service such as a shop assistant to a customer or a policeman to a member of the public as in 'Can I help you, madam?’ It is never used as a title before someone's name. She also mistakes the given name for the surname.