Teas and Herbal Extracts

Younger generation greet elder generation with a cup of tea. That is a way to show their respect.

One note is that, in organizations and families, only people of lower rank serve tea to higher rank people. At least it was like that in the old days.

Today, the society is more liberal. Parents may pour kids a cup of tea at home, bosses may pour subordinates a cup of tea at restaurants. But it's just parents and bosses being nice. It would be inappropriate for low rank to expect high rank to serve tea in formal occasions.