Dirty sky in Beijing.
14Apr2012, I am inflight KA937(Reg. B-HYB) enroute from ZBAA to VHHH. Flight took off from RWY01 of ZBAA at 0800L and after 1hour and 59 min I met the A380 of China Southern/CZ(Reg. B-613X).
I am sure you can spot something different here.