Preslav (Bulgarian: Преслав) was the capital of the First Bulgarian Empire from 893 to 972 and one of the most important cities of medieval Southeastern Europe. The ruins of the city are situated in modern northeastern Bulgaria, some 20 kilometres southwest of the regional capital of Shumen, and are currently a national archaeological reserve.

The modern Veliki Preslav (Bulgarian: Велики Преслав, "Great Preslav") is a town and the seat of government of the municipality (obshtina) of the same name, which in turn is part of Shumen Province. A former village, it assumed the name of the medieval capital in 1878 and became a town in 1883. As of December 2009, it has a population of 8,951 inhabitants.

The town lies at 43°10′N 26°49′E / 43.167°N 26.817°E / 43.167; 26.817, 92 m above sea level.

The name of Preslav is of Slavic origin; apparently it was initially founded and functioned as a Slavic settlement until its fortification at the beginning of the 9th century. The proximity to the then Bulgarian capital of Pliska led to the fast development and expansion of Preslav during the reign of the Khans Krum and Omurtag. By the time of the coronation of Khan Boris I in 852, Preslav had turned into an important strategic military centre and was the seat of the Ichirgu-boil. A number of churches were built in the city after the conversion of the Bulgarians to Christianity in 864.

Li Si (Chinese: 李斯; pinyin: Lǐ Sī; Wade–Giles: Li Ssu) (ca. 280 BC – September or October 208 BC) was the influential Prime Minister (or Chancellor) of the feudal state and later of the dynasty of Qin, between 246 BC and 208 BC. A famous Legalist, he was also a notable calligrapher. Li Si served under two rulers: Qin Shi Huang, king of Qin and later First Emperor of China—and his son, Qin Er Shi. A powerful minister, he was central to the state's policies, including those on military conquest, draconian centralization of state control, standardization of weights, measures and the written script, and persecution of Confucianism and opponents of Legalism. His methods of administration of China is seen by some as being an early form of totalitarianism.

Li Si was originally from Shang Cai (上蔡) in the State of Chu. As a young man he was a minor functionary in the local administration of Chu. According to the Records of the Great Historian, one day Li Si observed that rats in the outhouse were dirty and hungry but the rats in the barnhouse were well fed. He suddenly realized that "there is no set standard for honor since everyone's life is different. The values of people are determined by their social status. And like rats, people's social status often depends purely on the random life events around them. And so instead of always being restricted by moral codes, people should do what they deemed best at the moment." He made up his mind to take up politics as a career, which was a common choice for scholars not from a noble family during the Warring States Period.