According to Baidu Encyclopedia, what's the name of Dad's father is the first lyric of Family Courtesy Song. The lyrics are: What's the name of Dad's dad? Dad's father is called grandpa. Released on May 24th, 20 18, and sung by Baby Bus, it is a children's song introducing family titles.

The children's song "Family Courtesy Address Song" teaches the baby how to address the family and relatives around him politely. The lyrics are simple, which makes children feel intimate and easy to understand, and can improve their language learning.