On Chinese houses, people often place scriptures for luck, health, wealth, etc. Often, they use the word 福 [fú] turned upside down, like this: What is the reason for it?
In English it perfectly fine in a business context and for someone you have never met before to use Dear XXXX at the beginning of a letter or email. This causes some difficulty when moving to another ...
For example, how do they normally sign off letters? We normally use 'Yours Faithfully' or 'Your Sincerely' but we might not be so formal in emails and instead just 'Regards'. What is standard ...