Data is the basis of thesis writing. After the topic selection, design, observation and experiment, collecting and processing data is the further preparation for writing a paper.
Thesis writing materials can be divided into primary materials and secondary materials. The former is also called original data or direct data, which refers to things that the author personally participates in investigation, research or observation, such as records made in experiments or observations, and belongs to this kind of data; The latter is also called secondary data or indirect data.