Supplement Number 1

Supplementary Materials S1-S4 present a comparison of the chiral strength and Q-factor between q-BZF-BIC and conventional q-BIC, demonstrating the advantages of q-BZF-BIC in achieving chiral response. Supplementary Material S5 and S6 illustrates the robustness of our structure within a certain fabrication tolerance range. Supplementary Material S7 shows the far-field polarization states based on the GR modes, providing a comparative analysis with BZF-BIC. Supplementary Material S8 displays the far-field polarization states corresponding to intrinsic chirality under two different periodic perturbation parameters, elucidating the origin of intrinsic chirality. Supplementary Material S9 shows the origins of extrinsic and intrinsic chirality achieved through BZF-BIC.