In ancient times: knotting ropes to record events was to tie knots on the rope. Big knots were tied on big things or big numbers, and small knots were tied on small things or small numbers.

The communication field, including the field of mass communication, is a transformation process in which traditional analog formats are completely replaced by digital formats. The digital age is a great era, especially in our media field where our information stored, processed and disseminated by computers has been promoted and disseminated at the greatest speed. Digital technology has become the core technology and common technology of all types of contemporary media.

Post-information society:

Agricultural society, the era of slash farming, land is a scarce resource, agricultural economy, large-scale innovation of agricultural tools and water conservancy. There is a famous saying in social history: "Food is the first priority for the people, and the people are the first priority for the ruler."

In industrial society, in the machine age, capital is a scarce resource, and in the industrial economy, mechanical equipment is innovated on a large scale. Industrial society is also called post-agricultural society. Social and historical famous saying "Time is life, efficiency is money."

In the information society and the Internet age, knowledge is a scarce resource, knowledge economy, high-tech large-scale innovation. The information society is also called post-industrial society. Social and historical famous sayings "knowledge is power" and "science and technology are the primary productive forces".

In the post-information society, in the era of philosophy, creativity is a scarce resource, the creative economy, and large-scale innovation in design concepts. ?Social and historical famous sayings "I examine myself three times a day" and "Thinking is the first need in life."