Among those CRH380As, 2670, 2671, 2685～2688, 2695, 2696, 2718, 2719, 2724, 2725, 2732, 2734～2736, 2740, 2766 and 2767 are based in Nanning, so it can be inferred that this train runs G421 to Nanning East. G421 and G529 are two high speed trains with longest distance in China (and in the world?) - 2478 km.