  In this note, we will show that delta invariant of a log Fano pair can be
approximated by lc places of complements of plt type if it is no greater than
one. Give a log Fano pair with delta invariant no greater than one, under the
assumption that delta invariant of the log Fano pair can be approximated by lc
places of bounded complements of plt type, we show the existence of the
divisorial valuation computing delta invariant of this log Fano pair.
