The beamline provides VUV source from the undulator with an energy range of 7.5 to 124 eV to investigating the photoionization spectroscopy and dynamics of atoms, molecules, radicals, clusters and aerosols. The endstations include: (1) Main experimental chamber with supersonic molecular beam and RTOF mass spectrometer. (2) SR photoionization aerosol mass spectrometer with TSI differential mobility analyzer and condensation particle counter. (3) Laser photolysis -- radical reactor for atmospheric radical reaction kinetics. (4) Threshold photoelectron-photoion coincidence spectrometer with velocity imaging. (5) Multi-stage photoionization chamber. The scientific programs cover atomic & molecular physics, cluster science, reaction dynamics and kinetics, material science, atmospheric environment chemistry, biological chemistry and interstellar chemistry.