Why is the spear falcon called the Haidongqing

"Haidongqing" is a word in traditional Chinese culture that refers to a very good falcon, the spear falcon. The Spear Falcon is a small, agile bird of prey that is mainly found in northeastern China and the Russian Far East. In ancient times, spear falcons were widely used in hunting and military operations, and were highly prized for their speed, aggressiveness and hunting skills. The word "Haidongqing" was first used in the Historical Records of the Xiongnu (Xiongnu列传), describing the use of falcons by the Xiongnu people during hunting. Later, this word gradually became a representative word in traditional Chinese culture, used to describe those excellent talents and things. The word "Haidongqing" was also used to describe the spear falcon to express the praise and respect for this excellent falcon.