Only way, to earn without flying, is buy your groceries from Woolworths, BWS & BigW, but no SC earn.
contact QF via their call centre and ask about changing flights, deffering, if you can.
If you must, then you have to get there maybe by train from Russia, or another country that has rail links to HKG SAR of China.
No way to earn SC without flying QF or any OW airline, in the past you or I could earn QF SC via some credit cards, but these don't exist anymore.
Contact QF and see about changing (deferring the flights), or cancel and lose some $/points, and fly SQ or BA to SIN, then an airline to DME Moscow, and rail it across the country to China's border, or road it down by bus to as close as you can to the Chinese border.
If they close every land border and Chinese airports, then you are "stuffed".