Thai businessmen to choose to work with those that they respect. In business situations communication is always formal and it is important to watch body language as well.
It is essential to have respect for rank and age. The eldest person in any group has a certain amount of seniority and should be treated as such. Due to their need for politeness at all times, Thai people will find it hard to say no so you should be aware of any negative signs in body language.
Many Thai women do have jobs and when compared with salary differences in some other countries, women in Thailand are able to earn a reasonable living.