China is an ancient civilization with a history of five thousand years, and in this five thousand years of history, our culture has not been broken, which makes many of our things have been continuously inherited, so China's existing historical relics and cultural heritage are among the best in the world.
Most of the cultural relics owned by our country are very precious, such as the stepmother Pengding, the Yue Wang Gou Jian Sword, etc., which are not only old, but also have important historical and cultural value, which is an important basis for examining the production level and cultural level of ancient China, but due to various reasons, many cultural relics in our country have been lost.
The following 4 cultural relics are China's top national treasures, which are of great value and have deep historical and cultural value, but due to some reasons, their whereabouts are still unknown.

1. Jiuding
Jiuding is a treasure forged by Xia Yu, the founder of the Xia Dynasty. At that time, after Xia Yu established the dynasty, he divided the world into nine states, and at the same time he ordered the pastors of the states to contribute bronze to him, and then let the craftsmen cast jiuding with these bronzes. In the process of casting Jiuding, the craftsmen engraved the famous mountains and rivers and strange things of Kyushu on the Ding, so jiuding has also become a symbol of the world.
Since then, Jiuding has also become synonymous with China, symbolizing the supremacy of imperial power. Because Jiuding symbolizes power, later monarchs attach great importance to it, and it has also become a national treasure of the Xia, Dynasty, and Wednesday Dynasties. During the Warring States period, the Zhou royal family declined, and after the princely states became stronger, they had ambitions to replace the Zhou royal family, so qin, Chu and other states also went to the Zhou king's city of Luoyi to seek Ding, with the purpose of obtaining Jiuding to replace the Zhou king.
Jiuding is a very precious historical relic, but its whereabouts are still a mystery.
The Book of Feng Zen records: "Zhou De declined, Song Zhishe died, Ding Nai fell, and fell out of sight." Before the Qin Dynasty, that is, when the "Song Society died", Jiuding had disappeared. There are two kinds of records in the Supplement to the Book of Han and the Chronicle of suburban rituals: First, Jiuding was destroyed by the Zhou royal family and minted into copper coins. Second, Jiuding was sunk in Surabaya.
Whether Jiuding is a Ding or a Jiuding is not recorded in history, so there is still controversy.
2. Qin Shi Huang Yuxi
After Qin Shi Huang destroyed the Six Kingdoms and established the Qin Empire, he believed that his merits had surpassed all the kings before him, so he was not satisfied with the title of "king", and he chose the word emperor and emperor among the three emperors and five emperors to call himself. At the same time, he also had Li Si engrave a jade seal as a symbol of imperial power.
Li Si carved the famous Heshi Bi into a jade seal, and carved eight seal characters on it, "Ordered by Heaven, Shou Yongchang", making it a relic of "Imperial Power, Orthodox and Legal". Successive monarchs have attached great importance to the jade seal, it has also become the object of people's contention, with the jade seal, it is equivalent to "being ordained by the heavens", you can be the emperor with a straight face, otherwise it is a "white version of the emperor", saying that the emperor is insufficient.
The Qin Dynasty established by Qin Shi Huang did not pass on to thousands of generations and ten thousand generations, but died in the second generation, so the Jade Seal of Qin Shi Huang also quickly fell into the hands of others, and later changed hands several times and passed to the Tang Dynasty, but it was lost by the late Tang Emperor Li Congke, so that the whereabouts of qin Shi Huang Yuxi were unknown and lost tracks.
3. Orchid Pavilion Set Order.
The Lanting Collection Is a representative work of "Shusheng" Wang Xizhi. In the ninth year of the Reign of Emperor Mu of Jin, Xie An, Sun Qi, and other celebrities held a graceful gathering in Lanting, HuijiShanyin, where they drank and wrote poems together, and finally copied the poems they created into a collection and asked Wang Xizhi to preface it, which led to the famous Lanting collection.
Because of Wang Xizhi's remarkable achievements in calligraphy, his Lanting collection also has high artistic value. The Lanting Collection is also the pinnacle of China's calligraphy works, which is comparable to the Qingming Upper River Map. Because the Lanting collection has a high artistic value, the later generations of literati and inkers love it. At the same time, many emperors were also deeply interested in the Lanting collection order, among which Tang Taizong Li Shimin liked the Lanting collection order very much.
Because Li Shimin liked the Lanting collection order, after his death, he took it underground as a funerary product, but later tomb robbers did not find the Lanting collection order in Li Shimin's tomb, so the Lanting collection order also became an unaccounted for treasure.
4. The Sword of Kowloon
Qianlong was a literati emperor who loved poetry and painting, and he achieved great success in both of these points. At the same time, Qianlong was also a collector, and during his sixty years of reign, he collected many treasures, the most famous of which was the Nine Dragon Sword.
After Qianlong's death, he also brought the Nine Dragon Sword to the tomb, and later the Qianlong Tomb was stolen by Sun Dianying, and the Nine Dragon Sword also fell into the hands of Sun Dianying. Sun Dianying's tomb robbery caused him to stab the honeycomb, causing an uproar among the Manchus, and Puyi and others demanded that the Republic of China government severely punish Sun Dianying.
In order to avoid blame from the Republic of China government, Sun Dianying gave the Nine Dragon Sword to Chiang Kai-shek, but Dai Kasa kept it for himself. Later, Dai Kasa was on a plane crash, and he was also killed in that accident, and since then the whereabouts of the Nine Dragon Sword are unknown. But there is also a theory that the Kowloon Sword was also burned in the plane crash.