Just got this email, checked price for flying to Beijing during November and got $807, thra's nearly half price of what I paid last time. The email also said "Book and pay by 11 June 2013, for travel up to 30 November 2013 and you will be entitled to 30kg baggage allowance; plus every ticket purchased with a transit in Singapore will receive a S$40 voucher to spend at Changi Airport", not sure if it's for KrisFlyer member only.
Fine Prints
^ Final booking is 11 June 2013 and for travel up to 30 November 2013. All fares (below) are for return travel in Economy Class from Brisbane during low season. The price include the price of the air ticket, associated taxes, levies, and surcharges including credit card service fee correct as at 31 May 2013. Additional terms and conditions apply. To make a booking, visit singaporeair.com or contact Singapore Airlines Reservations on 13 10 11.
Destination
Economy Class all-in fare AUD ^
Bali / Jakarta / Manila
773
Kuala Lumpur
794
Phuket
799
Beijing
815
Colombo
1158
Barcelona
1703
London
1893