NIMA Pub117, 2005 "Radio Navigation Aids" lists Hua-lien (XSY) on 8700kHz (A1A) but the 2014 edition has no listing for this station.
This maybe related that Typhoon 20W (Megi) passed over Taiwan in the last day or so.
NSNL 146 (November 2009) under "Utility round-up" "Unid CW stations" the added note suggests: "8700 kHz is a Russian military net"