Abstract: This article tells the development history of atomic absorption spectroscopy through Xiaohua’s journey to the instrument museum in his dream. From the discovery of the atomic absorption spectroscopy phenomenon to the commercialization process of atomic absorption spectrometers, it also emphasizes the important applications of atomic absorption spectroscopy in multiple fields. It ends with Xiaohua waking up from the dream and being determined to study the relevant knowledge in depth, inspiring readers to continue exploring.

Key words: Atomic absorption spectroscopy, Instrumental analysis, Sharp-line light source, Atomizer, Continuous-source