Business relationships develop slowly in Thailand. It may take several meetings or several months or even several years to forge a successful partnership.
Since the Thais are supportive of hierarchies and respect all forms of authority, decisions are made by senior management with little consultation of middle or junior management. The eldest person in the group is always the most revered.
If you want to build a long-term relationship in Thailand, make sure that you are too are respected and are always courteous when dealing with others (the Thais call such demeanour jai yen or ‘cool heart’).
As in many Asian societies, non-verbal communication is often more important than verbal communication. You must watch your own body language and facial expressions, as these often will be believed much more your words.
You must also watch the non-verbal demeanour of your Thai counterparts. Remember that it is difficult for most Thais, as with many Asians, to criticize or give a direct ‘yes/‘no’ response to difficult business questions. So avoid placing them in an awkward position.