  As the TeV halos around Geminga and PSR B0656+14 have been confirmed by HAWC,
slow diffusion of cosmic rays could be general around pulsars, and the cosmic
positron spectrum from pulsars could be significantly changed. As a
consequence, the most likely pulsar source of the positron excess, Geminga, is
no more a viable candidate under the additional constraint from Fermi-LAT.
Moreover, the latest measurement by AMS-02 shows a clear cutoff in the positron
spectrum, which sets a strict constraint on the age of the pulsar source.
Considering these new developments we reanalyze the scenario in this work. By
checking all the observed pulsars under the two-zone diffusion scenario, we
propose for the first time that PSR B1055-52 is a very promising source of the
positron excess. B1055-52 can well reproduce both the intensity and the
high-energy cut of the AMS-02 positron spectrum, and may also explain the
H.E.S.S $e^-+e^+$ spectrum around 10 TeV. Moreover, if the slow diffusion is
universal in the local interstellar medium, B1055-52 will be the unique
reasonable source of the AMS-02 positron spectrum among the observed pulsars.
