Glimpse into the pion gravitational form factor

We provide a novel approach to calculate the gravitational form factor of pion under ladder approximation Bethe-Salpeter equation, with contact interactions. Central this is symmetry-preserving treatment dressed $\pi\pi$ amplitude, which shows explicitly contributions from intrinsic quarks and bound states, latter being necessary produce $D$-term in soft-pion limit. The we work can be applied many processes physical significance.