Dog days are the hottest time of the year, and swimming pools and water parks have become a paradise in summer. In ancient times, when the cooling means and facilities were primitive, one of the best ways to escape from the heat was to be hydrophilic-bathing in the pre-Qin period was called bathing in ancient times, that is, washing your body with water; The ancients also called bath water "soup". In Chinese characters, it is neither "mu" nor "bath" but "ying" that retains the ancient bathing image. In Oracle Bone Inscriptions, "surplus" refers to a person taking a bath in the bathtub naked. Some scholars believe that this word reflects the bathing habits of the ancients in the pre-Qin period in China. Bathing and hygiene are symbols of civilization. China has a long history of bathing and enjoying the cool. According to Song Gaocheng's The Origin of Everything, China people had a bathing culture in the era of "Three Emperors and Five Emperors", and Gao Xin's family took a bath before China people. In the eyes of the ancients, bathing is a very serious matter, and sometimes it is mysterious, sacred and exquisite. In ancient times, it was necessary to change clothes when taking a bath, and even the frequency and times of bathing were stipulated. When the guests come, please invite them to take a bath first, and then set the banquet. Modern people call it "welcome" to entertain guests from afar, which is the heritage of this custom. In the Han dynasty, civil servants were required to take a bath every five days. At that time, all officials, big or small, went home on holiday. The day when it is the turn to take a bath is called "taking a bath", which is also the origin of the modern civil servant vacation system. In midsummer, some emperors simply take a long vacation and let everyone go home to take a bath for the summer. In ancient times, there were obvious grades of bathing, and mixed bathing between men and women was not allowed. The "Yuanyang bath", which is quietly popular among modern fashion couples, was strictly forbidden in the early days, otherwise it would be "rude". In the Zhou Dynasty, one of people's moral codes of conduct at that time was to prohibit couples from taking a bath together. The Book of Rites is an important treatise selected by the Han people to record the laws, regulations and customs in the pre-Qin period. Among them, there is a paragraph in the internal rules that men and women "dare not take a bath" when taking a bath. The traditional explanation of "hissing", that is, the modern bathroom, means that couples can't use the bathroom. In fact, men and women are required not to take a shower. Because the ancients believed that bathing with women was not only "rude", but also brought bad social atmosphere and bad luck, resulting in imbalance between yin and yang, which was not conducive to health preservation. With so many beautiful women bathing naked in the pool, Yuan Shundi, who was watching from the sidelines, was in high spirits, her abnormal psychology was greatly satisfied, and the summer heat disappeared, which was euphemistically called "the joy of welcoming auspiciousness on the water". The most famous "water emperor" in ancient times was Li Longji, Emperor Xuanzong of the Tang Dynasty, who took a bath with his favorite concubine Yang Yuhuan. This place is called Huaqingchi, which is located in Lishan Mountain, Lintong County, Shaanxi Province. It is famous for its hot springs. This is a romantic place and became famous in Qin and Han Dynasties. According to Xin San in the Eastern Han Dynasty, Qin Shihuang Ying Zheng liked to bathe here. One summer, he saw a beautiful woman taking a bath by the spring, and had an erotic idea and came forward to flirt. Who knows that the beauty is a fairy, spitting on Qin Shihuang's face, causing him to have sores and pus. Qin Shihuang admitted his mistake and begged for mercy. The goddess cured her sore with hot spring water. This is the legend of "Goddess Soup" in Lishan Hot Spring. Huaqingchi is famous for Li Longji, but he didn't develop it. It is the "Tang Bath Palace" built by Emperor Taizong and Li Shimin in the 18th year of Zhenguan (AD 644) on the hot spring Mount Li. After Li Longji proclaimed himself emperor, in the sixth year of Tianbao (AD 747), Chunchi was rebuilt and expanded, merged into a luxurious palace and renamed Huaqing Palace, hence the name Huaqing Pool. Huaqingchi has "Jiulong Soup" for the emperor's bath and "Haitang Soup" for Yang Guifei's bath. There is also 16 for concubines and members of the royal family to bathe in, and the site still exists today. Modern archaeology has unearthed five kinds of hot spring baths recorded in historical materials, such as Lotus Soup, Begonia Soup, Star Soup, Prince Soup and Shangshi Soup. Huaqing Pool is richly paved. Every summer, Li Longji takes Yang Guifei here to take a bath for the summer. They can't take a bath in Yuanyang in public, because each has its own special bath, but the romantic Li Longji is dishonest. According to Wang Renyu's "The Legacy of Kaiyuan Tianbao" in the Five Dynasties, they often "play in it". Based on this, the good pigeon of Changbai in Qing Dynasty invented a miniature novel "Tianbao Site", which is the first article of "Firefly Window and Different Grass": In the Ming Dynasty, a cave was found near Lishan Mountain, and there was a royal book by Li Longji on the entrance stone door: "My concubine and I, whenever we meet, spend the summer in summer, * * * enjoy the fun in the cave ..." Folk summer "People with good economic conditions will learn from the royal family. At the end of the Tang Dynasty, when Ye Li (Tang Zhaozong) was in power, our governor Lehman once dug a deep pool in his own yard. In summer, every time a guest visits, Lei Man will hold a banquet by the pool. When he is in a good mood, he will throw his glass into the pool and touch it naked in the water. After drinking water, get out of the water, get dressed and drink water. Song Huizong's favorite Yang Jian once dug a big pool in the backyard. The difference is that Yang Jian never enjoys himself with others. He built a porch around the swimming pool, which was quite hidden. In summer, he jumped into the swimming pool alone. However, in ancient times, in addition to simply bathing with water at home, ordinary people also used natural water to cool off the heat. At that time, the river was not as polluted as it is now, and the river was crystal clear, and there was no outbreak of cyanobacteria and green algae. This is a real natural bathing beach. In some places, bathing in the river is gender-neutral. It is not surprising that men and women, old people and young people, are naked in the same river, which reflects the feelings and customs of a simple people. In everyone's impression, it seems to be a Japanese custom for men and women to bathe together, but it is not. In the pre-Qin period, the "Wu and Yue people" located in the present-day Jiangsu and Zhejiang provinces were like this. It is recorded in Biography of Shangshu that "it is the custom of wuyue for men and women to bathe in a river together", which means that men and women bathe in a river together in summer. The custom of men and women bathing together exists not only in ancient Jiangsu and Zhejiang provinces, but also in ethnic minority settlements in southwest China, including parts of Vietnam today. " "The Biography of Nan Man in the Later Han Dynasty" said, "Its vulgar men and women share a river, so they call each other. "There is a story of' bathing in the same river' in Shen Defu's Supplement to Wan Ye Li in the Ming Dynasty, which is about this phenomenon. Shen Jishan, a good friend of Shen Defu, was once the magistrate of Panyu County, and was later demoted to Shendian tail (now Dianbai County, Guangdong Province). The servants at home go out together after dinner every day and come home very late. Shen Jishan thought he was gentle with him, but the servant refused to tell him the reason. One day after lunch, Shen followed him to a river outside the city and discovered the secret: "I am very happy to see all ages undress and go into the water." "This custom has survived at least in the Qing Dynasty. Wu Zhenfang's Miscellanies of Lingnan in Qing Dynasty is what he saw and heard when he traveled to Guangdong and other places. At that time, in western Guangdong, every year in April of the lunar calendar, women went to the riverside to bathe naked until September of the lunar calendar. My father-in-law takes a bath with his wife, brother-in-law and sister-in-law. It doesn't matter if a man meets a woman's private parts. But you can't touch a woman's breasts, which means "touching her privacy in the shower is not taboo, but touching her breasts is angry."