We can see this card came from the post office at Tiananmen Square, but, sorry, we don’t know which stadium this is.  (It is identified in Chinese on the front.)  The card has one perforated edge, and looks like a lottery card, so it may have been part of a set, or had a stub.  Regardless, it was mailed in 2013 and has four stamps and two official postmarks alongside a bilingual red Par Avion chop and another large red 60th anniversary logo in the message area.  Grade: 1