This can refer to:
"look at the emperor." Chinese idiom, pinyin for Wà ng Dí tí ju ā n, means the sad cry of cuckoo, which is often used to express sadness and homesickness. Du Fu, a classic from birds.
Interpretation of idioms: There is a saying that "Looking at the emperor and singing cuckoos", which refers to the sad cry of cuckoos, and is mostly used to express sadness and homesickness.
Idiom allusions:
According to legend, Du Yu, the king of Shu in the Warring States Period, proclaimed himself emperor. He made great contributions to the management of floods in Shu. After his heroic retirement, he gave up his Zen position to his courtiers, and he retired to live in Xishan and became a cuckoo after his death. In the spring, he wailed day and night, crying sadly until he vomited blood in his mouth.
Extended data
Worship the cuckoo's heart can refer to the historical allusion "Looking at the emperor to crow the cuckoo." Folklore:
Legend has it that there is a dragon in the upper reaches of Minjiang River (Sichuan Province), which often causes floods and harms people. Long Mei went to the lower reaches of Jiading Mountain for flood discharge, and the dragon was kept in an iron cage in Hushan Mountain. Hunter Du Yu asked for water treatment for the people. When I met Xian Weng, I gave him a bamboo stick and told him to save Long Mei. Du Yu fought the dragon with a bamboo pole, defeated it, and rescued Long Mei at the foot of Wuhu Mountain. Long Mei helped Du Yuping cure the flood and became Du Yu's wife.
Du Yu was also acclaimed as king by the people. Du Yu has a thief minister and a former hunting friend. He often envies Du Yu for having a beautiful wife, and he wants to harm her by promoting to a higher position and making a fortune. One day, when he was hunting in the mountains, he met an evil dragon and plotted with him. He lied that the dragon wanted to make peace with Du Yu and his wife, so he lured Du Yu to the mountain and imprisoned him. The thief usurped Du Yu's position and forced Long Mei to be his wife. If Long Mei doesn't obey, she will be imprisoned. Du Yu was imprisoned and died in the mountains.
He turned the cuckoo into a soul, returned to the Forbidden City, flew around his wife, moaned day and night, and stopped crying until all the blood came out, saying, "Go back to Wenyang! Go back to Wenyang! " Christophe Wen is the Yang of Wenshui, which is the so-called "Wenshan governs the city" in Biography of King Shu. His wife, Long Mei, heard his voice and died of grief. Her soul turned into a bird and she left with her husband.
Therefore, the heart of worshipping Juan is to miss the old country.
References:
Baidu Encyclopedia-Wang Di Juan