It a color movie, maybe from around 1995-2005, from either Chinese or Taiwan or Hong Kong.
It about a vacation in a city for the father (engineer or the like, left home to work far away) and his son (from the village) after years away of each other. They fight, argue… because they can’t understand each other after years away, but then gradually bond together. Then in the end they reveal the truth: they are both paid actors, hired to perform the role since the ones they try to be already dead, but no one have the courage to tell the other side the sad news, and the vacation is made beforehand (kind of work condition).