What do you mean, mud cows enter the sea?

Mud cows enter the sea, that is, cows made of mud, commonly known as "spring cows". In China's feudal society, the day before beginning of spring, the spring cattle made of clay by the government were placed in front of the government house, and it was very early in beginning of spring, and they were beaten with red and green whips to welcome the spring, which predicted the morning and evening of spring ploughing. Ru Tang? Lu Zhao's book "Spring Cattle List Book" when he was in Qilianzhou said: "If you are not hungry, why should you use spring cattle!" Liu Meng also has a poem saying: "The village women pray for silkworms to be cocooned, and the old farmers say mud cows when they are old", which is a custom of begging for good harvest with cows in the spring. However, the word "mud cow into the sea" originated from Volume 8 of Jingdezhen Chuandeng Record: "Dongshan (Liangjie) asked again,' What reason does the monk see to live in this mountain'? Shi Yun:' I saw two mud cows fighting into the sea, and there is no news until now.' ""the five lights will be yuan? "Zen Master Yuanri" said: "Three-legged donkey jumped into the sky, and mud cow went into the sea without news." Later, I used the word "mud cow into the sea" to mean never to return and never to be heard from again.