The supermoiré lattice, built by stacking two moiré patterns, is regarded as the next generation moiré quantum matter. The main challenge in assembling a graphene supermoiré lattice is its rotational alignment, due to the random nature of the edge and crystal symmetry. Dr Junxiong Hu from Prof ARIANDO’s team developed a novel technique and successfully realised the controlled alignment of double-aligned supermoiré lattice. The team coined the ‘Golden Rule of Three’ to guarantee the success of the proposed technique. This allows robust study of strongly correlated electron systems in quantum geometry and boosts the development of twistronics.