  We observed the high-mass star-forming region G176.51+00.20 using the
Five-hundred-meter Aperture Spherical radio Telescope (FAST) with the 19-beam
tracking observational mode. This is a pilot work of searching for neutral
stellar winds traced by atomic hydrogen (i.e., HI winds) using the high
sensitivity HI line toward high-mass star-forming regions where bipolar
molecular outflows have been detected with high sensitivity by Liu et al. HI
wind was detected in this work only in Beam 1. We find here that, similar to
low-mass star formation, no matter how large the inclination is, the HI wind is
likely sufficiently strong to drive a molecular outflow. We also find that the
abundance of HI in the HI wind is consistent with that of the HI narrow-line
self-absorption (HINSA) in the same beam (i.e., Beam 1). This implies that
there is probably an internal relationship between HI winds and HINSA. This
result also reinforces the assertion that HI winds and detected molecular
outflows are associated with each other.
