Our new work entitled “Temperature- and field angular-dependent helixcal spin period characterized by magnetic dynamics in a chiral helimagnet MnNb3S6” is published in Sci. China-Phys. [Sci. China-Phys. Mech. Astron. 66, 217511 (2023)]. In this work, we perform the systematic ferromagnetic resonance experiment to investigate thoroughly the detailed dependence of magnetic dynamics corresponding to the nontrivial CSL in MnNb3S6 on the field magnitude, angle, and temperature. We find that chiral helimagnet MnNb3S6 exhibits a distinct field angular dependence of spin resonance in lowfield nontrivial CSL from the uniform FMR in high-field FFM. Then, we propose a modified Kittel model considering partial helix spin textures, which can successfully describe the experimentally observed spin dynamics of the low-field nontrivial CSL at different temperatures. Moreover, the modified Kittel model also enables us to extract temperature and field-dependent proportion of the helical spin texture and helical spin period ratio L(H)/L(0), like the sophisticated Lorentz micrograph technique used in most chiral helimagnets. The demonstrated method can generally be used as an alternative and easy-access approach to explore interesting magnetic dynamics not just in MnNb3S6 and other topologically nontrivial chiral magnets.