What does the end of the sea mean?

"Tianya Haijiao" literally means "the edge of the sky, the end of the sea" in Chinese, but in the eyes of China people, the cultural significance of this word is more emphasized. In China's ancient poems, there is a famous sentence "However, China holds our friendship, and heaven is still our neighbor". In China's love song, there is also a swan song "I hope you can love me forever, and I hope you can accompany me to the ends of the earth". "Tianya Haijiao" has become synonymous with the ultimate meaning, which is used to describe the remoteness of the region and the supreme realm of friendship, love and life.