In ancient times, drums were played when two armies were fighting and attacking. Why were gongs used instead when retreating?

In ancient wars, gong soldiers were ordered to retreat, but the exact wording was "ring the gold coins". Beating drums and jingle bells were orders from ancient military commanders. Beat the drums of war, beat the drums of war. In the beginning, Mingjing was Mingjing, not Gong. "Shuowenjiezi" means "like a bell, with upper and lower handles". Jing is an ancient musical instrument made of copper with a color like gold. "Advance and retreat by sound" comes from "Sun Tzu Ji Bing": "Advance and retreat by listening to drums, advance and retreat by listening to gold, and retreat by listening to gold." ?. Gongs are smelted from copper. ?

Its structure is relatively simple. Use a hammer to strike the front of the gong's center. Produces vibration and pronunciation, and was first used by ethnic minorities living in southwestern China. After the Qin and Han Dynasties, with the exchange of ethnic groups, palaces gradually spread in the mainland. It was introduced to the Central Plains region in the early 6th century AD. At that time, the relatively simple gong gradually replaced the jing and was widely used in wars. More importantly, Dai Dong, a linguist in the Southern Song Dynasty, wrote in his book "Six Books": "Today's golden voices are soldiers." You can also think of a loan basin? (Loan Basin - Copper Basin, easy to use). Although the jingjing is mainly used for formal occasions, there are also jingjing (officials responsible for honking the horn and beating the drum). Finally, it explains the origin of the drums entering Beijing and Tianjin and retreating. Legend has it that during the Battle of Zhuolu when the Yellow Emperor conquered Chi You, the Yellow Emperor killed Kui with a drum skin and heard 500 yuan from the sound (the "Prince" in Volume 582 of "The Taiping Heavenly Kingdom"). When the Yellow Emperor fought with Chi You , he hunted a dock animal on Liubai Mountain in the East China Sea. It is shaped like a cow, and its entire body is black and blue, accompanied by a faint light. It has only horns on its head and one foot. ?

This animal, with its electrified eyes and thunderous voice, is very powerful and majestic. At that time, Huangdi was abandoned because of his crying, peeled off his skin and turned into 80 drums. The negro lady struck the drum herself, and immediately the sound was thunderous, reaching 500 miles. In ancient times, Eastern Wood, Western Jin, Southern Fire, Northern Water, and Middle Earth corresponded to these five elements. Due to the underdeveloped science and technology in ancient times, these elements were usually not set before the war. At sunset, the sun was in the west, so there was a call to retreat. That is to say, the soldiers returned to the city to rest and blew the sunset horn. Fin drums are particularly useful in the military field. Said to be a large drum, 8 feet long with 4 feet on top, covered with leather on both sides. In addition, military drums, golden drums, etc. are also used in the army. These drums later developed into war drums of various sizes and were widely used in the military.