Heteroatom-embedded zigzag-type aromatic hydrocarbon belts are another interesting class of compounds. Conceivably, introduction of heteroatoms would create a diversity of novel zigzag belt structures. Most excitingly, precise inlaying various heteroatoms or site-selective replacing the carbon atoms with heteroatoms of distinct electronegativity and electronic configuration would enable fine-tuning of the physical and chemical properties of belts, leading to tailor-made molecules practically useful in chemistry, materials and life sciences. Despite fascinating aspects, heteroatom-doped zigzag-type aromatic belts remain largely underexplored until very recently. A few partly hydrogenated belts have been constructed and their conversion to fully conjugated ones, however, has not been achieved so far. For instance, in an attempted synthesis of pyrazine-containing belt in 2019, Wang and Miao prepared a box-like precursor consisting of four oxanorbornadiene sub-rings combining intermolecular Diels-Alder cycloaddition and condensation reactions.