Sarnitsa (also transcribed Surnica, Bulgarian: Сърница) is a small town in the Pazardzhik Province, southern Bulgaria. As of 2006^[update] it has 3 607 inhabitants. It gained its town status in 16 September 2003 and is part of the Velingrad municipality, located deep in the Rhodope mountains among remote virgin forests. The town has preserved its authentic atmosphere and old architecture and is a growing tourist centre, serving visitors of the Dospat Dam and surrounding forests.

Coordinates: 41°44′N 24°02′E / 41.733°N 24.033°E / 41.733; 24.033

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.