Evolution of the solid mass in the simulation with α = 5 × 10⁻⁴ that corresponds to the one presented by the colour blue in Figs. 2 and 3. The six timestamps in Fig. 2 are also denoted on the time axis. a) Solid mass budget. The solid mass is divided into four categories: the dust mass M_d inside and outside of 5 au, solids bound in massive bodies and ejected massive bodies. It shows a high planet formation efficiency that the majority of solid mass (85% of the initial dust mass beyond 5 au) are converted into massive bodies. b) Cumulative inflow of dust entered 5 au after 0.5 Myr. A total of about 1.6 M_⊕ of inflow to the inner disc is recorded over the next 1.5 Myr up to the end of the simulation.