What are the contents of the three images of national unity?

Cherish national unity as much as you cherish your own eyes, cherish national unity as much as your own life, and hug each other as tightly as pomegranate seeds. According to the query on Sohu.com, the "three images" of national unity where the knowledge of national unity is popularized are to cherish national unity like one's own eyes, to cherish national unity like one's own life, and to hold each other tightly like pomegranate seeds.