Topics include but not limited to:

• Recent progress in high precision calculations for perturbative quantum field theory.

• Development of Monte-Carlo tools for current and future colliders.

• The potential of CEPC/ILC/FCCee for precision measurements at high energy using Zs, event shape, and jet observables.

• The potential of CEPC/ILC/FCCee for better understanding of QCD dynamics, including quarkonium production, multi-jet produciton, and non-perturbative aspects of QCD.