It is direction of President Joko Widodo, Jakarta-Bandung fast train project is now extended to Surabaya. Indonesia Coordinating Minister for Economy Airlangga Hartarto said. State-Owned Enterprises (BUMN) Erick Thohir follow up project. KCIC (PT Kereta Api Indonesia China) build 13 tunnels between Jakarta-Bandung on route of 142.3 km.  Train reach 4 stations at speed 350 km/h.

https://www.medcom.id/ekonomi/bisnis/GbmY0Mob-kereta-cepat-jakarta-bandung-diteruskan-hingga-surabaya