We use the Stamp Catalogue of China 2010 (also known as the "Chan Catalogue") as a reference, as it is the most complete and accurate reference book on Chinese Philately. The item "CHINA-SYS 2$ GREEN-ESSAY-BLOCK OF 4- RR" is in sale since Thursday, February 18, 2016. This item is in the category "Stamps\Asia\China".
The seller is "jmcoins2009" and is located in Presinge. This item can be shipped worldwide.