This is a sick society. The old man would rather trust the stranger he just met as his son than his own. Trust seems irrelevant. The root cause is greed, craving for enjoyment, wanting to live forever, or living a long life. Moreover, it is the son's thoughtlessness to his parents that gives the fake son an opportunity to be cheated. My son is under too much pressure, and the mortgage and car loan make him breathless at work. This is the reality