Use two hands when offering your business card to a customer from Asia, and do the same when receiving theirs. Take a moment or two to examine the card, acknowledge it, then place it on the table in front of you or in a business card holder. Don't put it in your back pocket and never write on a business card — doing so might offend your client. If you're conducting a lot of business in a particular country, consider having your card printed in both English and their language.