China fen cufflinks. Handmade Cufflinks from mint coins. The Cufflinks are made using the Chinese 1 Fen, part of the Renminbi, the currency on the mainland of the People’s Republic of China.These coins are no l onger used as a currency making them a collectors item, and the coins for this set came from a mint coin roll of coins. Click on the photo for a closer look at the cufflinks