Diana and Sywei Proof-1984
Diana and Sywei Proof-1985
Diana and Sywei Proof-1988
Diana and Sywei Proof-1989
Diana and Sywei Proof-1990
Diana and Sywei Proof-1991
Diana and Sywei Proof-1995
Diana and Sywei Proof-1996
Diana and Sywei Proof-1997
Diana and Sywei Proof-1999
Diana and Sywei Proof-2000
Diana and Sywei Proof-2004
Diana and Sywei Proof-2005
Diana and Sywei Proof-2006
Diana and Sywei Proof-2007
Diana and Sywei Proof-2009
