- Event: Qin Shi Huang, also can be called Ying Zheng, became the ruler of the Qin state at the age of 13. Through a series of military conquests and strategic alliances, he successfully unified China under the Qin Dynasty, marking the end of the Warring States Period (475–221 BCE) and the beginning of imperial China. His reign brought significant political, economic, and social transformations to China.

- Cause and Effect: During the Warring States period, conflicts over the dominance of various countries constantly led to a highly unstable military situation. Therefore, Qin Shi Huang wanted to end this chaotic era by conquering and unifying China while establishing and expanding his dynasty's hegemony. Qin Shi Huang unified China, centralized political power, and established a highly bureaucratic and centralized government. He implemented standardization measures, including a unified system of weights and measures, currency, and writing, to improve administrative efficiency and control. In addition, the emperor initiated numerous engineering projects, such as the construction of the Great Wall and canals, which facilitated trade and communication throughout the empire (A&E Television Networks, n.d.). On the social front, in order to carry out his unity policy, strengthen unity and obedience, and suppress dissent, he carried out a large-scale "book burning," that is, the burning of books and scholars who opposed his regime. Despite the terrible methods employed, Emperor Qin's unification laid the foundation for the later Han Dynasty and the consolidation of Chinese civilization.

- Reference: A&E Television Networks. (n.d.). Qin dynasty: Achievements, Facts & Time Period. History.com. https://www.history.com/topics/ancient-china/qin-dynasty#qin-unification

- Event: In ancient China, traditional writing materials, such as bamboo slips and silk, were expensive and difficult to obtain. A court official named CAI Lun invented the technique of making paper, mainly from rags, to make writing more accessible and affordable for the common people. This innovation led to a proliferation of books and literature. In addition, the lightness of paper promotes the spread of ideas and knowledge, facilitating cultural exchange and technological progress.

- Cause and Effect: The need for more efficient and affordable writing materials, coupled with continuous advances in technology and the availability of raw materials such as bamboo and silk, has led to experimentation with different alternative materials (One of the four great inventions of China, n.d.). The widespread use of paper transformed Chinese society, increasing literacy rates, facilitating bureaucratic management, and facilitating cultural and intellectual exchange. It not only laid the foundation for the spread of Chinese culture and knowledge abroad through trade and diplomacy, but also paved the way for the subsequent production of printing technology (One of the four great inventions of China, n.d.). The popularization of paper also promoted the progress of literary, artistic and scientific discoveries, which influenced the subsequent development of China and the world.

- Reference:One of the four great inventions of China: Paper-making-experts in China-englishchannel. English. (n.d.). http://www.stdaily.com/English/Service/2021-12/16/content_1239506.shtml

- Event: The Silk Road was a trade route connecting the East and the West, spanning more than 6,400 kilometers across Eurasia from Xi 'an （Encyclopædia Britannica，2024). It facilitates the exchange of goods, ideas, culture and technology between China, Central Asia, the Middle East and Europe. Named for the thriving silk trade along the route, the Silk Road played a crucial role in shaping the political, economic and cultural interactions between different civilizations.

- Cause/Effect: The establishment of the Silk Road was mainly due to the Western demand for luxury goods such as silk and spices, and the Chinese demand for jade, ceramics and other products（Encyclopædia Britannica，2024). And Christianity is also spreading east along this Silk Road. In addition, the expansionist policies of empires such as the Han Dynasty in China and the Roman Empire in the West facilitated the opening of trade routes and the establishment of diplomatic relations. The Silk Road facilitated the exchange of goods such as silk and spices, and promoted economic growth and prosperity along the route. It also spread technologies such as paper, printing and gunpowder between civilizations. In political terms, the Silk Road is also beneficial to friendly diplomatic relations between countries along the route, spreading political ideas, ideologies and governance systems. The Silk Road led not only to the exchange of goods but also to the exchange of ideas, religions, languages and cultures. It enabled the spread of religions such as Buddhism, Christianity, and Islam (Encyclopædia Britannica，2024).

- Reference:Encyclopædia Britannica, inc. (2024, January 23). Silk road. Encyclopædia Britannica. https://www.britannica.com/topic/Silk-Road-trade-route

- Description: The exact date and inventor of gunpowder's invention remain uncertain, but it is believed to have originated with alchemists searching for the elixir of life. Chinese alchemists discovered gunpowder, a mixture of saltpeter, sulfur, and charcoal, initially used for fireworks and later for military purposes.

- Cause/Effect: Alchemists, while searching for the elixir of immortality, experimented with various substances and chemical reactions and stumbled upon a recipe for gunpowder (History of gunpowder). The invention of gunpowder changed the situation of war. In the past, it was all swords and other weapons, but now it has explosive projectiles, firearms, and finally cannons (History of gunpowder). The technique gradually spread from east to west. Economically, the production of gunpowder and firearms became a lucrative industry, stimulating trade and manufacturing. On the social front, the militarization of society and the prominence of firearms have changed the dynamics of conflict and the strategy of war.

- Reference: History of gunpowder. Epic Fireworks. (n.d.). https://epicfireworks.com/pages/history-of-gunpowder

- Event: The Opium Wars were two conflicts between China and Western powers (mainly Britain) over trade, territorial control, and the opium trade. During the First Opium War (1839-1842), the Chinese government tried to stop the illegal opium trade conducted by British merchants, but the British defeated the Chinese army with advanced military technology and signed the Treaty of Nanjing in 1842 (U.S. Department of State, n.d.). The treaty forced China to cede Hong Kong to Britain, open five treaty ports to Western trade, and pay reparations. The Second Opium War (1856-1860) was caused by increased tensions between China and Western powers, over trade restrictions and unequal status. The conflict also led to the burning of the Summer Palace in Beijing by British and French forces. China was also forced to sign the Treaty of Tianjin (1858), which expanded Western access to the Chinese market, legalized the opium trade, and granted extraterritorial rights to foreigners in China.

- Cause/Effect: The Opium Wars were mainly caused by the economic interests of Western countries, especially the United States and Great Britain, who wanted to correct the trade imbalance with China by exporting opium (U.S. Department of State, n.d.). The Opium War exposed China's weakness and marked the beginning of the Qing Dynasty's decline. They have also led to the forced opening of China to trade, territorial concessions and the spread of foreign influence. Unequal treaties signed after the war further eroded China's rights, leading to the gradual decline of the Qing Dynasty. Economically, the opium trade and the opening of treaty ports led to social unrest. The Opium Wars fueled anti-Western sentiment and nationalist movements that led to reform and revolutionary movements (U.S. Department of State, n.d.).

- Reference: U.S. Department of State. (n.d.). U.S. Department of State. https://history.state.gov/milestones/1830-1860/china-1

- Event: The Xinhai Revolution overthrows the Qing Dynasty, leading to the establishment of the Republic of China. In 1927, the Kuomintang led by Chiang Kai-shek established the Republic of China, with its capital in Nanjing, marking the beginning of the Republic era (Cucchisi, 2002). However, the country is still controlled by different warlords in different areas. In 1927, the Chinese Civil War broke out between the Nationalists and the Communists. The Communist Party faced challenges including the Long March and Japanese aggression during World War II, but it gradually won over the rural population through guerrilla warfare tactics and promises of land redistribution (Cucchisi, 2002). Chiang Kai-shek and the remnants of the Nationalist government retreated to the island of Taiwan, where they continued to govern under the name Republic of China.

- Cause/Effect: Because of political fragmentation, economic instability, and social unrest, the ideological and territorial disputes was caused between the Nationalist Party (KMT) and the Communist Party. The Kuomintang's failure to address widespread corruption and social inequality further fueled discontent, leading to the rise of the Communist movement (Cucchisi, 2002). The Communist victory in the Chinese Civil War reshaped the country's political landscape - the establishment of the People's Republic of China - and ousted the Kuomintang government. The incident allied the People's Republic of China with the Soviet Union, while Taiwan became a staunch ally of the United States.

- Reference: Cucchisi, J, L (2002), The Causes and Effects of the Chinese Civil War, 1927-1949, Seton Hall University Dissertations and Theses (ETDs). 2361. https://scholarship.shu.edu/dissertations/2361

- Event: The Communist Party of China, led by Mao Zedong, won the Chinese Civil War and then the People's Republic of China was established. After decades of political turmoil, and foreign occupation, the Chinese Communist Party has emerged as the dominant political force. On October 1, 1949, Mao Zedong announced the founding of the People's Republic of China on the Tiananmen Gate in Beijing, marking the end of the Kuomintang government and the beginning of communist rule in China.

- Cause/Effect: Decades of social, political, and economic turmoil, including the overthrow of the Qing Dynasty in 1912, the chaotic warlord era, the Japanese invasion, and the Chinese Civil War (1927-1949), have led China to struggle along the path of reform. The KMT government failed to address poverty, corruption and inequality, but the Communist Party gained more support for land reform and social justice through promises to other citizens such as farmers (Encyclopædia Britannica). The Communist Party implemented socialist policies, including the nationalization of industry and the suppression of dissent, consolidating its control over all aspects of society (Encyclopædia Britannica). The founding of the People's Republic of China reshaped China's role in global affairs, setting the stage for its subsequent economic transformation and rise as a world power.

- Reference: Encyclopædia Britannica, inc. (n.d.). Establishment of the people’s republic. Encyclopædia Britannica. https://www.britannica.com/place/China/Establishment-of-the-Peoples-Republic