Who can help me explain the exact meaning of this couplet? Great gods, help!

Shang Mulberry Forest Merchants: Shang Mulberry Forest was originally a large-scale and national-level sacrificial activity, and its nature was the same as that of sacrificing "society" (land god). Until the Spring and Autumn Period (about the 5th century BC) in the Mozi era, "Sanglin" was still a grand sacrificial activity that attracted thousands of people's attention. The music and dance used in the sacrifice of "Sanglin" will also follow its name and be called "Sanglin". Zhuangzi, the third health care master, once described the movements, rhythms and sounds of the technicians when they tried to solve the problem with a very fluent style. According to its indirect description, it is not difficult to know that Sanglin's music and dance are powerful, agile and dexterous, and the music is shocking. Tang prayed at the beginning of Sanglintang's accession to the throne. During the Shang Zhouwang period, there was a drought for five consecutive years, the sun was like fire, rivers and wells dried up, fields were chewed by turtles, and plants withered. Historians in the Tang Dynasty burned the salaries saved in the suburbs and sacrificed cattle and sheep to the gods. When Tang prayed, he blamed himself, listed six mistakes he might make, and prayed to God for rain, but it was useless. When the drought lasted until the seventh year, Tang built an altar in the mulberry field to pray for rain. After divination, historians say that it will rain only if the living sacrifice. Tang believes that begging for rain is for the people, how can it harm the people? I decided to sacrifice myself. He cut off his hair and nails, bathed himself and prayed to heaven: "I am guilty alone, and I can't punish everyone." All people are guilty. Don't hurt Chunmin's life because of my own fault! " After praying, he sat on the pyre. Just as Wu Zhu was preparing to make a fire, the heavy rain suddenly came, and everyone cheered and praised the virtue of raising soup. This piece of music was named Sanglin, also known as Da, and later called Tang Le. The origin of human beings was created by the Yellow Emperor, and then endowed with five senses of limbs by other gods, such as Pian and Sanglin. See the article on Lin in Huai Nan Zi: "Yellow Emperor gives birth to Yin and Yang, Pian gives birth to eyes and ears, and Mulberry gives birth to arms and hands. This statement is very interesting, very similar to what the Germans said. Unfortunately, other ancient books have not described what kind of gods the last film and the mulberry forest are, leaving only a mystery. Lu dance: Lu dance altar is an earthen altar set up by the ancient state of Lu to pray for rain, that is, the dance altar of "bathing in interpretation and dancing in the wind" mentioned in the Analects of Confucius. Because of the dense trees, it is difficult to see the whole picture. At present, in the north of Yihe River in the south of Qufu (called Dayi River locally, and Xiaoyi River in the north), 104 National Road is on its east side, and there is a Wutan Middle School nearby. Kunming Han: Kunming Pool in Han Dynasty is a very special large-scale artificial lake in Shanglinyuan, which is very famous in history. It is located in the southwest of Chang 'an, Doumen Town on the east bank of Fenghe River. There was an artificial lake in this area a long time ago, which belonged to Haojing in the Western Zhou Dynasty. In the unearthed bronze inscriptions, it is mentioned many times that there is a big pool in which Zhou Wang once rowed. Some people speculate that this may be Zhou's luck. In Qin dynasty, there was a pickaxe pond. In the thirty-fifth year of Qin Shihuang (2 12), the palace was built in the south of Weishui. I used to think that the top of Nanshan was a que and the water of Fan Chuan was a pool. This vicious pool is actually the predecessor of Kunming Pool in Han Dynasty. The Kunming Pool was opened in Han Dynasty, and the archaeological investigation found that its site area was about 150 hectares. According to "Three Auxiliary Huang Tu": "Emperor Wu Yuan of Emperor Gaozu wore Kunming Pool for three years, and he was in the southwest of Chang 'an, and returned to forty miles a week. "Biography of Southwest China" said: The son of heaven sent an envoy to beg for bamboo, was poisoned by the state, and was shut down by Kunming. The son of heaven wants to cut it, and the state-owned Dianchi Lake in Kunming is more than 300 miles. It's called Kunming Pool because it looks like Kunming Pool and fights with water. "History of Food in Han Dynasty" said: "If Vietnamese want to fight China ships, they should overhaul Kunming Pool and set up pavilions around it. The ship is more than ten feet high, and the flag is added to it, which is very strong. So the son of heaven thought it was a Bailiang platform, dozens of feet high, and the palace was thriving. "In the process of excavating Kunming Pool, many ancient sites were destroyed, including a part of Haojing site in the Western Zhou Dynasty. When the black soil formed by ancient people's activities was dug up, it was explained that it was a "grey robbery" in history, and it was an important archaeological understanding of ancient people in China. Kunming pool has a wide water surface, and its entertainment function is particularly prominent except for water warfare. There are many magnificent palaces and decorative buildings by the lake. Archaeologists found many remains of palace buildings around the pool. At that time, there was also a Yuzhangtai in the pool, where you could watch the lake. In addition to warships, there are many cruise ships in the lake, and emperors often lead singers and dancers to have fun here. This big ship, called Zhang Yu Ship, stands among the palaces. Legend has it that it can carry ten thousand people. Three-foot-long stone whales are carved on the lake, and giant animal stone carvings are placed on the water, which follows the practice of Qinlanchi Palace. Chi Pan designed a stone statue of Penny and Weaver Girl, and separated the pool to symbolize the Milky Way and the stars in the sky. So far, these two stone carvings of the Western Han Dynasty are still preserved in their original places, in Gu Zhuo, where the carving technique is simple. This is a precious early stone carving work. The Kunming Pool diverted water from the upper reaches of the Fenghe River, forming a huge lake in the southwest highland of Chang 'an in Han Dynasty, which made the Kunming Pool have multiple functions: one is to ensure the water supply of Chang 'an in Han Dynasty, and the other is to adjust the water source of water transportation. In essence, this is its most important function. As for training the navy, water sightseeing, fish breeding base and imitating the astronomical phenomena, it is all its subsidiary functions. It shows that the water conservancy planners in the Western Han Dynasty are very discerning and good at giving full play to the comprehensive functions of water conservancy projects. Kunming pool and its upstream are located in Shanglin Garden controlled by the royal family, which can ensure the cleanliness of water sources. The terrain is higher than Chang 'an, so you can enter the city by yourself. The storage capacity is huge, which can provide sufficient water for a metropolis like Chang 'an. In addition, because Chang 'an had a large population at that time and the food supply was relatively tight, water transportation was an important means to transport food from Guandong to Guanzhong, and it cost at least several hundred thousand stones every year. However, the Weihe River is shallow and difficult to transport, so we need to use the artificial canal on the south bank of Weihe River for shipping, and Kunming Pool is the source and important transportation channel of this canal. The reason for the construction of Kunming Pool is very strange in the history of ancient gardens in China. In order to attack a Kunming country with a lake thousands of miles away, Emperor Wu of the Han Dynasty spared no effort to build such a large lake next to the capital to train the water army, hence the name Kunming Pool. Combined with the later utilization of Kunming Pool, it is inevitable for the emperor to find a high-sounding excuse for his investment in amusement enjoyment. Interestingly, in the Qing Dynasty, the rulers did the same trick again, and used the funds from the navy to build the Summer Palace, which is a magnificent and famous garden in China. The lake inside is called Kunming Lake, which shows the influence of Kunming Pool, a water conservancy building in Han Dynasty, on the history of China. ————————— The bottom allied refers to the position of the ancient temple at that time, which is comparable to several famous places in ancient times.