There fares are for scattered dates in March - June 2018.
Beijing (PEK):
Brisbane (BNE) - $551 - https://www.google.com/flights/#search;f=BNE;t=PEK;d=2018-03…
Melbourne (MEL) - $496 - https://www.google.com/flights/#search;f=MEL,AVV,MEB;t=PEK;d…
Sydney (SYD) - $544 - Direct! - https://www.google.com/flights/#search;f=SYD;t=PEK;d=2018-03…
Shanghai (PVG):
Sydney (SYD) - $518 - Direct! - https://www.google.com/flights/#search;f=SYD;t=PVG;d=2018-03…
Thanks OP. What do you think are the chances of getting sale flights return SYD/PEK for under $300 like last year?