As far as I know, the three universities you asked are all very strong, and any one will have a good future. Specifically, the advantages of these three deputy ministerial-level 985 universities are:

Sichuan University: leather manufacturing, polymer materials, hydraulics and river dynamics, stomatology, biomedicine, religion, Chinese language and literature;

Dalian University of Technology: mechanics, hydraulic engineering, chemical engineering and technology, management science and engineering, shipbuilding and environmental engineering;

Central South University: non-ferrous metals (geology, mining, mineral processing, smelting, materials), machinery, battery technology (electrochemistry), civil engineering, transportation (railway), basic medicine (genetics, pharmacology, neurology, public health), clinical medicine, railway (bridges and tunnels, high-speed train dynamics), etc.