The vernacular translation of "a leopard cannot change his spots, but his spots are covered with grass and trees" is: although the country is dead, the mountains and rivers remain unchanged, and spring grass is scattered in the urban areas.
Extended data:
Wang Chun's Theme Thought
In November of the 14th year of Tianbao in Tang Gaozong (755), An Lushan transferred troops to rebel against the Tang Dynasty. In June of the following year, anti-thieves captured Tongguan, and Tang Gaozong hurriedly fled to Sichuan. In July, Crown Prince Hengli proclaimed himself emperor in Lingwu (now Gansu) and assisted Tang Suzong.
Knowing this news, Du Fu placed his relatives in Duzhou and took refuge in the Su Zong government alone. As a result, the tragedy was captured by the anti-thief in the middle and escorted to Chang 'an, Beijing, but he was not imprisoned because of his low rank. In the spring of 757 A.D., in the second year of his trip from Tang Suzong to Germany, Du Fu, who was in the occupied area, saw the gloomy and scattered scenery of Chang 'an with his own eyes before writing this masterpiece that has been celebrated for thousands of years.
The whole poem is calm, sincere and natural, which embodies the poet's feelings of loving the motherland and caring for his family. Modern people such as Xu Yingpei and Zhou Rongquan commented on this poem: "The meaning is not straight, the scenery is not smooth, the feelings are strong but not floating, the things are rich but not miscellaneous, and the meter is rigorous but not rigid." This theory is quite appropriate. "A letter from home is worth a thousand pounds of gold" is also a famous saying that has been passed down through the ages.