Ancient Chinese texts generally originate from a variety of sources, including historical records, philosophical treatises, literary works, and religious texts. These sources are primarily found in the classical Chinese language, which has been in use since the Shang Dynasty (c. 1600 BCE). The most significant origins of ancient Chinese texts can be traced back to the following:

1. Historical Records: The earliest form of ancient Chinese texts is found in historical records, such as the "Shang Shu" (Book of Shang) and the "Zhou Bi" (Book of Zhou). These texts provide insights into the political, social, and economic aspects of ancient China.

2. Philosophical Treatises: The Warring States period (475–221 BCE) was a time of great intellectual activity, leading to the development of various philosophical schools, including Confucianism, Taoism, Legalism, and Mohism. Texts such as the "Analects" of Confucius, the "Tao Te Ching" of Laozi, and the "Mencius" of Mencius are prime examples of philosophical treatises from this era.

3. Literary Works: Ancient Chinese literature includes poetry, prose, and drama. The "Shi Jing" (Book of Songs), the earliest collection of Chinese poetry, dates back to the 11th century BCE. Other notable literary works include the "Jing Jing Fa" (Classic of Mountains and Seas) and the "Lun Yu" (Discourses and Sayings of Confucius).

4. Religious Texts: Religious texts, such as the "Yijing" (Book of Changes) and the "Lunyu" (Treatise on Filial Piety), also play a significant role in the origin of ancient Chinese texts. These texts provide insights into the religious and spiritual beliefs of ancient Chinese society.

The reasons for the origins of these texts are multifaceted. Firstly, the ancient Chinese society was characterized by a strong emphasis on education and the transmission of knowledge. This led to the creation of various texts that served as educational tools and sources of wisdom. Secondly, the political and social changes during different periods of ancient China necessitated the documentation of historical events and the formulation of new ideas. Lastly, the cultural and religious beliefs of ancient Chinese society were deeply intertwined with the creation of these texts.

Data supporting these origins can be found in various historical and archaeological findings. For instance, the discovery of oracle bones from the Shang Dynasty provides evidence of early written records. Additionally, the "Shi Jing" contains poems that reflect the social and political conditions of the time. The "Analects" of Confucius, which was compiled by his disciples, offers insights into the teachings and philosophy of Confucius. These texts, among others, have been foundational in understanding the origins and development of ancient Chinese culture and thought.