How big was the ancient royal hunting ground? What's in it?

Your question is too broad to answer clearly ~ Does the ancient hunting ground refer to similar hunting in past dynasties ~ The most famous royal hunting ground is of course Mulan paddock in Qiu Wei, Qing Dynasty, which is the largest royal hunting ground in the world. Mulan paddock, a royal hunting garden in Qing Dynasty, is located in the northeast of Hebei Province (Weichang Manchu and Mongolian Autonomous County, Chengde City), bordering on Inner Mongolia grassland. Since ancient times, it has been a grassland rich in water plants and animals. "Li Qian Pine Forest" was once the hunting place of Liao emperors, and "Mulan paddock" was also the place where Qing emperors held "Mulan Begging for Immortals". In A.D. 168 1 year, Emperor Kangxi of the Qing Dynasty opened more than 10,000 square kilometers of hunting grounds here to exercise the army. In the first half of the Qing Dynasty, the emperor led princes and soldiers of the Eight Banners to come here for hunting and tourism every year, which was called "Mulan Qiuxian" in history. During the 140 years from Kangxi to Jiaqing in Qing Dynasty, Mulan held 105 times here. Mulan means whistling for deer in Manchu. What is a whistle deer? When hunting, the Eight Banners wear antlers, and it is a hunting method of trapping and killing to lure female deer by imitating the singing of male deer in the forest. The paddock is where deer whistle and the emperor hunts. Mulan paddock was a virgin forest and vast Mongolian grassland in Qing Dynasty. The Royal Hunting Ground in Qing Dynasty was an important activity place for the Qing emperors to inspect the north, which was built in the 20th year of Kangxi (168 1). Mulan paddock is a mixed name of Manchu and Chinese. Mulan means "deer whistle" or "deer whistle" in Manchu. It was originally used as a tool to catch deer. It is made of birch bark or tree, two or three inches long and shaped like a horn. Blow or suck with your mouth, and make the sound of "Yo Yo" Luming Literature to lure deer. After the establishment of Wei Lan paddock, the emperor held a tour to the north every autumn, that is, Mulan's ritual of seeking immortality, which gradually became a custom. Yongzheng reign 13 years, he has never been to the paddock, but his will is "future generations should follow the imperial examination, learn martial arts Mulan, and never forget the family law." The emperor spends nearly a month every autumn, which is a great event in the imperial court. From the capital to the paddock, palaces were set up according to the mileage and terrain for the emperor to drink tea, sharpen his point, stay and work. Every time the emperor hunts, it usually takes more than twenty days. After the hunting, a grand farewell party was held in Zhang Sanying Palace (now Longhua County, Hebei Province), with drinking, singing and dancing, wrestling competitions, and banquets for Mongolian princes and other princes, who were rewarded according to their meritorious service. Together with the summer resort, it became another political activity center of the Qing government.