  The origin of the quasi-periodic eruptions (QPEs) is possibly mass loss at
the periastron of a body moving around the supermassive black hole (SMBH) in a
high eccentric orbit. Such a tidally stripped star is expected to radiate
gravitational wave thereby leading to shrinkage of the periastron distance, and
thus will eventually be disrupted by the SMBH in the previous studies. This
scenario predicts a gradually increasing mass transfer, contradicting the long
term evolution of the observed intensity of the QPEs in GSN 069.In this paper,
we first revisited the orbital evolution of the stripped star. Then we
suggested a model of a tidal stripped WD moving inside an accretion disk for
QPEs in GSN 069.We found the effect of the mass transfer finally dominates the
orbital evolution, resulting in the stripped star finally escaping the SMBH
rather than being disrupted by it. The drag force by the disk can effectively
reduce mass transfer and thus explain the observed long term evolution in the
intensity of the QPEs in GSN 069. The disk is likely a fallback disk of the
tidal disruption event in GSN 069. Considering the evolution of its accretion
rate, the increase in the intensity of the latest eruption can also be
explained.
