Large-momentum effective theory is Feynman's approach to patron physics in the context of QCD, in which partons emerge as static properties of the hadrons in the infinite momentum limit. Therefore, not only partons are now accessible through Euclidean field theories such as lattice QCD, almost all parton observables and light-cone physics can be numerically simulated. However, current precision calculations of few percent accuracy require controls of resummations of perturbative large logarithms in EFT matching as well as higher twist effects. I will discuss how these can be done in simple examples.