Today, when I came home from a meeting with a couple of colleagues, I met my neighbor's brother-in-law playing Chinese chess with my dad.
He is a very active 76-year-old, who flies frequently. He had also visited my dad before taking his usual trip to Vietnam for work. He spent about six months overseas visiting neighboring countries in Vietnam. We also talked for hours when my mom came home from work, and now I'm told to YouTube some things he introduced to us.