  For tracking and tagging the cosmic-ray muon (CR-muon), the Taishan
Antineutrino Observatory (TAO) experiment is equipped with a top veto tracker
(TVT) system composed of 160 modules, each consisting of plastic scintillator
(PS) strip as target material, embedded wavelength shifting fiber (WLS-fiber)
as photon collection and transmission medium, and silicon photomultipliers
(SiPMs) at both ends as read-out. This article introduces the unique design of
the module and reports the excellent performance of all modules, providing
guidance and important reference for the process design of scintillation
detectors with WLS-fibers. In general, when the CR-muon hits the center of
plastic scintillator and without optical grease, the most probable value of the
signal amplitude at one end of the PS strip is greater than 40.8 p.e. and 51.5
p.e. for all the 2 m-length modules and 1.5 m-length modules respectively. The
CR-muon tagging efficiency of PS module is measured to be more than 99.3%,
which meets the requirement of TAO.
