The expression denotes respect and love for one’s home and elders. In ancient times, people planted mulberry trees around their homes to raise silk worms, and catalpa trees for the wood. Gradually, these came to symbolize respect for parents and ancestors, and later extended to include their home and birthplace. Such homesickness and love of one’s native place are some of the deepest and most enduring human emotions, giving people a sense of identity and belonging. These emotions have been extolled by men of letters throughout the ages, and they have become an important manifestation of love for one’s country.