What do you mean by putting Shi Niu at the door of the unit for help?

The ancients were superstitious, believing that the appearance of Shi Niu symbolized good luck or foretold disaster. Biography of the Mang History of Wang Han: "It's the age of Guangrao Jing, the general of Tun, and thousands of people want clouds. Dabao belongs to Cang Hong. The new scenery in Jingyanqi County, Shi Niu in Yunyanba County and Hongyan Fufeng are always welcome. " "Song Shu Wu Xing Zhi Si": "At the end of Shi Hu, 90 miles northwest of Luoyang City, Shi Niu suddenly called Qingshi and heard its voice 40 miles away."