What kind of feelings did the poet express when China kept our friendship and heaven was still our neighbor?

However, when China maintained our friendship and heaven was still our neighbor, the poet expressed his farewell to his friends and his deep and inseparable feelings for friendship. According to relevant public information, it means that even if friends are at the ends of the earth, we can still contact each other as if we were together. This is true friendship. This kind of feeling is full of affection, sincerity and passion, which expresses the poet's treasure and belief in friendship. This poem was written in the Tang Dynasty, "Farewell to Governor Du in Shu", from Longmen, Jiangzhou (now Hejin, Shaanxi).