Internal structure and elemental abundances from convective thermal pulse to the convective envelope in the AGB for 4 M_⊙ with Z=0.014. The grey shaded area represents the convective zone, and the middle region is the convection-interruption zone between the convective thermal pulse and the convective envelope. The left panel shows the case with IGW mixing considered, and the right panel shows the case without IGW mixing. For the x-axis, M_r represents the Lagrangian mass coordinate; M_He is the Lagrangian mass coordinate of the outer boundary of the convective thermal pulse.