Experiments require time to deliver results.
However, the writing of the "thesis" could begin in advance, with the modular, conceptual, and framework-related content getting put on paper first.
The thesis Link was writing belonged to the category of experimental papers, generally composed of an introduction, main text (experiment principles, experimental materials, equipment and methods, experiment process, experiment results, analysis and discussion), conclusion, and references.
The introductory section needed to be explicit, elaborating on the rationale, purpose, and significance of the experiment.