  In this paper, we provide new 1 Ms $Chandra$ ACIS spectra of two quasars in
the Chandra Deep Field South (CDF-S), which were previously reported to show
strong and extremely blueshifted X-ray emission/absorption line features in
previous 1 Ms spectra, with outflowing bulk velocity $v\sim$0.65-0.84c. In the
new 1 Ms spectra, the relativistic blueshifted line feature is solidly
confirmed in CXO CDFS J033225.3-274219 (CDFS 46, $z$ = 1.617), and marginally
visible in CXO CDFS J033260.0-274748 (CDFS 11, $z$ = 2.579), probably due to
the increased Chandra ACIS background in the new 1 Ms exposure. The new data
rule out the possibility (though very tiny already based on the old 1Ms data)
that the two sources were selected to be unusual due to noise spikes in the
spectra. The only likely interpretation is extremely blueshifted iron
absorption/emission line or absorption edge due to relativistic outflow. We
find that the rest frame emission line center in CDFS 46 marginally decreased
from 16.2 keV to 15.2 keV after 7 years. The line shift can be due to either
decreasing outflowing velocity or lower ionization level. Including the two
quasars reported in this paper, we collect from literature a total of 7 quasars
showing blueshifted emission or absorption line feature with $v\geq0.4c$ in
X-ray spectra, and discuss its connection to jet and/or BAL (broad absorption
line) outflow.
