Dear friend,
     I am from Beijing, China.
     I have many MNH stamps and SS/MS in full sets which issued from P.R.China, HK, Macao, Taiwan, Japan, Korea(North and South) and worldwide countries.
     I like MNH stamps and MS/SS from worldwide countries. I prefer 1990-2010 stamps and MS/SS. 
     I have Scott 2009 but we can use any catalogs.