Nuclear Magnetic Resonance (NMR) spectroscopy is a high-precision analytical technique that exploits the resonance phenomenon of atomic nuclei in a strong magnetic field under radiofrequency pulses to obtain detailed information on molecular structure and chemical environments. When nuclei with intrinsic spin (such as ¹H and ¹³C) are placed in a stable magnetic field and excited by radiofrequency irradiation, they generate detectable signals that, after Fourier transformation, yield NMR spectra. These spectra are used to elucidate molecular structures, functional groups, bonding relationships, and molecular dynamics. The instrument employs the JEOL JNM-ECZL series FT-NMR system (e.g., ECZ500 class), featuring high magnetic field stability and advanced digital radiofrequency control technology. It supports both one-dimensional and two-dimensional NMR experiments, including multinuclear measurements such as ¹H and ¹³C, as well as structural elucidation experiments such as COSY, HSQC, and HMBC. In addition, the system can be equipped with automatic sample changing and variable-temperature accessories to enhance analytical efficiency and experimental flexibility. Such NMR instruments are widely applied in organic synthesis, medicinal chemistry, materials science, and life science research, and are indispensable analytical tools for molecular structure determination and fundamental research.