Unfortunately, IRI doesn't show the EMU (local) trains in the arrival departure section, my friend. There are 4 pairs of EMU trains which run in between PKU - HLZ section of SER, and all of them stop at MSDL. The train numbers are 38051 - 38058 (total 4 pairs). Search in IRI about their TT and you will get to know that they indeed stop here. :)