Liu was born in Chuzhou (now Huai 'an, Jiangsu). His father, Yan Dao, was once a well-known official in the inner class and a senior eunuch.

In the period, Liu was an advanced class, but his official position was only nine grades, which was equivalent to the county magistrate or main book of middle and lower counties. Because he is studious, conscientious and superior in ability, he has won the trust of his master. After Song Taizong acceded to the throne, he promoted Baibeifang, and his palace products jumped from the original nine products to the positive eight products. Since then, he has been ordered to leave Beijing many times to handle related matters on behalf of the court.

In the autumn of the fourth year of Taiping and Xingguo (AD 979), Qidan invaded Zhou Zhen (now Zhengding, Hebei), and Song Taizong sent troops to meet it. Liu Ling led troops to Dingzhou for a rainy day. At that time, the Yellow River burst into a slippery state, and Liu and others were ordered to govern the river, and the soldiers Ding Fu blocked the breach and guarded the riverbank.

During the period of Yong Zhengdi, Liu was ordered to be the treasurer of activities and the Imperial Capital Division, and was appointed as the supervisor of Yan Dao array, and later appointed as the special envoy, and moved to Luoyuan.

On March 3, the third year of Chunhua (AD 992), he sent a letter to the company to determine the weighing method in detail, and Liu, then the treasurer of the company, accepted this important task.

In the third year of Xianping (1000), Song Ting proposed to build the Tianxiong Army Fortress (now daming county, Hebei Province), and Liu was ordered to teach the scriptures. In order to solve the problem of * * * in Zhou Huan, he advocated increasing troops in Mubo Town, Zhou Huan (Huanxian County, Gansu Province) to help all walks of life. Zhenzong accepted his suggestion.

In the sixth year of Xianping, the Qidan army attacked Dingzhou Wang Du. When Song Jun arrived in Wang Du from Gaoyangguan for assistance, he met the Qidan army and suffered a crushing defeat. Liu ordered to act according to the problem. According to Liu's investigation, the court punished some generals who had seriously neglected their duties.

In the second year of Jingdezhen (1005), Yu Yingzhou, Song Jun suffered a crushing defeat. Liu instructed to verify the situation, and the court rewarded meritorious personnel according to the facts.

In the first year of Dazhong Xiangfu (1008), in the process of sealing Mount Tai, Liu was responsible for sending envoys, moving Zhao Xuanshi and keeping envoys in Changzhou.

In May of the second year of Dazhong Xiangfu, Liu, who was ordered to revise the tea law, compiled a book about the tea law and presented it to the twenty-three Tea Laws of Zhenzong.

In order to strengthen the management of Tibet, Liu Cheng formulated a series of relevant regulations and submitted five volumes of Instructions on Tibet to Zhenzong.

For five years, he asked to be an official on the grounds of physical illness. Zhenzong specially set up Jingfu Hall to grant him this honor and made him an observer in NSW.

In six years, Wang Qinruo, Yang Yi and others edited "Popular Auspicious Symbol" and Liu's "Book House Yuan Gui" were successfully compiled.

In the sixth year of Dazhong Xiangfu, Zhenzong saw that Liu Jiu was ill and weak. In order to change the name of Taoism to the meaning of city life, he changed it to Gui and appointed him as General Zuo and an official of Anyuan Army. Liu Gang died as an official.

The detailed weighing method of house deed is from Han Dynasty to Tang Dynasty, and the weight units are named as baht, two (24 baht) and gold (16 liang). Hook (30 kg), stone (four hooks). Although the Tang system used to call it a penny and two cents and ten cents. At that time, the carry of this "point" was not determined to be one tenth of the money. It says, "Six baht is one point, that is, two and a half dollars." Song Chengtang system followed the name of money, but small units only used money, which was not enough to meet the actual needs at that time.

In view of this situation, on March 3, Chunhua sent a letter to the company to determine the detailed weighing method, and handed this important task to Liu, the special envoy of the treasurer. After Liu was appointed, he made a careful investigation on the choice of the old style, and found a problem: the old bronze styles of Taifu Temple ranged from one yuan to ten Jin, and all 51 were not allowed. Foreign governments had to count their own gold every year, and the styles were damaged from the beginning of money. To this end, he proposed to "make other things", that is, to develop a new scale suitable for measuring the weight of gold and silver.

In order to realize the trade-off reform, Liu carefully studied the previous trade-off methods. According to the relevant records in Hanshu, he designed and manufactured two new scales, namely, taking the millet in Hanshu as the ruler, taking the millet as the inch, taking its ruler of joy (referring to the ruler of a teacher) as the second skill, taking the box according to the ruler, taking the image of the millet, making one and a half yuan with the image, and making one or two second-class scales. The two scales made by Liu embody a new method of weighing from scales.

The main contents of the new dual-name system can be summarized as four points:

1, the so-called weighing law is that 15 Jin equals one Jin, which is 242, which is 2400 yuan. Its carry relation is to weigh from gold, using multiples of fifteen; From binary to decimal, multiples of 24, all decimal places are calculated from these two decimal places.

2. There are two systems for rounding small units, namely decimal rounding: 1 money = 10× 1 minute =10×10cm =10×1000. T Millet rounding method: 1 two =24 baht =240, t=2400 millet, the so-called "product millet shall prevail first".

3. The so-called "one-and-a-half-yuan weighing method" is adopted, that is, its weighing is 15, accounting for 360 millet, 24 millet per minute, and 2.4 millet.

4. Use the so-called "one to one principle" to weigh one or two, that is, it is 24 baht, 2400 millet, 24 cents, 240 millet, 2.4 millet, and 24 millet.

After the reform of Song and Liu, the balance was accurate. At that time, the imperial court ordered a department to make a batch of new names according to the new law of copper casting in summer, and awarded them to Dading House, which was divided into the inner house and the outer house, and then awarded them to the whole country. Advantages and disadvantages are meaningless, and Chinese and foreign countries think it is convenient.

Book house yuangui

Liu is a historian, and he has also made some contributions to the compilation and collation of historical books. He likes reading, learning to ask questions, meeting scholars and visiting facts. When he cares, he pays attention to the accumulation of books and is good at classified management.

In the first year of Xianping, he died in the secret pavilion of the three museums for a long time, and ordered Liu to be responsible for sorting it out. Together with Du Gao, the school manager of the Secret Pavilion, he sorted these books and catalogued them. Zhenzong saw that Liu was very capable. Whenever the imperial court compiled important history books, he always ordered someone to write for him.

Liu's code collar. In the second year of Jingdezhen (1005), Zhenzong asked Wang Qinruo, Yang Yi and others to compile the deeds of monarch and minister in past dynasties, and put Liu in charge. The book has a huge content, which was compiled by different departments from ancient times to the Five Dynasties. * * * is divided into 3 1 department and 1 104 department. It was written and played in Dazhong Xiangfu for six years, and it was called "Yuan Gui in Bookstore", with a volume of * * *. This book sums up all seventeen periods of history. The books cited are all ancient books before the Northern Song Dynasty, and the historical materials are of high value. It embodies Liu's painstaking efforts.

In addition, Liu also participated in the compilation and revision of other historical books, such as the compilation of books, the compilation of Records of Taizong by Qian Kushui, and the compilation of national history and schools, all of which were led by Liu and made great achievements.

Four years after Jingdezhen participated in the activities of "heavenly book", Zhenzong, egged on by Vice Premier Wang Qinruo, indulged in the farce of "heavenly book", and Liu Ye participated in the scam of creating superstition.

In the first year of Dazhong Xiangfu, in the process of sealing Mount Tai, Liu was responsible for sending envoys, moving them to Zhao and protecting them to Chang. In two years, Zhenzong ordered the construction of Jade Qing Zhao Ying Palace in Beijing as an important place to worship the "heavenly book". To host the captain, Wei Liu lieutenant. The scale of the project is large, with 30,000 to 40,000 migrant workers serving and using building materials every day. They were recruited from all over the country. In order to cater to the emperor's favor, Liu Qu, who was hidden in his palm, chose on the spot and squandered the state treasury. There are few substandard rooms. Although they are magnificent, they should be destroyed and rebuilt. Some companies dare not calculate the cost. Among them, 12000 gold and 5200 silver were used for the three statues of the Palace of Eternal Life. This is also an amazing move since Liu owned it.

Liu has always been a good servant and many people are afraid of him. But they can forgive others when things go wrong. During the construction of Zhao Ying Palace in Qing Yu, the cast iron workers told him that thousands of kilograms of copper were stolen and buried in the ground before and after the prison. Liu listened quietly, pretended to ignore it, and then secretly sent someone to bring the stolen copper coins back to the public. It seems that no one has been found stealing copper at the construction site, and everything is going on as usual. Although the cast iron supervisor who stole steel has not been traced, he is uneasy. He is both afraid and grateful to Liu. Qing Yu Zhao Ying Palace was originally planned to be completed within fifteen years. Because Song Dynasty and Liu ordered the construction around the clock, it took only seven years to build this palace with an area of 26 10.

In the second year of Dazhong Xiangfu, Zhenzong drove the troops out of Tongguan and crossed the Weihe River to worship the shade. Liu An arranged all the supplies for this sacrifice. According to the mountains and rivers on the road, he used water transportation to deliver all the needed materials on time and safely.

Liu is loyal to Shinchan, who also regards him as a confidant. It will be a long time before the true Sect can lead a hundred officials to pay homage to the mausoleum, sealing it to the east and carrying the earth back. Liu was ordered to stay in the palace and take charge of the internal affairs. After the ceremony, when he was promoted to the rank of Liu, he was asked to resign. Zhenzong did not let Liu resign, and gave Liu a seven-character poem as an encouragement. Then he was appointed as a special envoy for propaganda and a national observer.

Honorary Liu has many meritorious deeds. He was an official in Yingzhou to promote political affairs and was an observer. He was specially appointed as the ambassador of Jingfu Hall to show his favor, and later he was appointed as an observer of NSW. Historically, he was energetic, upright, Confucian, fond of collecting books, able to interview facts and polite to natives.

Although Liu was a eunuch, his main job was to participate in military, political, economic, cultural and other activities, which was relied on by the emperor. After his death, he was named General Zuo and our envoy of Zhenjiang Army, and was named "Su Zhong". In the seventh year of Dazhong Xiangfu, Qing Yu Palace was completed, and Zhenzong posthumously awarded Wei Liu a servant shot, and sent envoys to the mausoleum to pay homage. At that time, the statue of the second temple was a tribute to the hero, and the statue of Liu was specially carved on the side of the statue by Zhenzong.

Among the eunuchs in the Song Dynasty, Liu was the first person to be added to posthumous title after his death. His statue was shaped on the side of the statue of Song Taizong, regarded as the hero of the emperor, and died at the same speed, which was also rare among eunuchs in the Song Dynasty.