What does it mean to solve the problem with geese in Shiyan Mountain, Yongjia?

Yongjia Shi Yanshan used the picture of wild geese to find a topic, which means that Zhao Linxing drew a picture as a souvenir before leaving, and then used the picture of wild geese as a poem. According to relevant public information, Yandang Mountain is mentioned in Zhao's masterpiece of calligraphy in his later years in the Palace Museum, entitled "Yandang Mountain Map in Yongjia", which shows that someone drew a very beautiful picture of Yandang Mountain at that time and asked Zhao to write it.