First copy of this station this winter. Last year it was a near everyday copy during the six weeks or so from early December to mid January when the days were shortest and I got the terminator connecting Denver to Hohhot at sunset my time. (I tried getting it in summer, when a similar greyline connection occurs when its sunrise here, but there were other stronger stations on that frequency then.)
Recording made at 0003 UTC (18 DEC) before it faded out:
https://www.youtube.com/watch?v=DyFh2lIjX3g