1 pun (a Korean yang coin composed of 95% copper and 5% aluminum) is lighter than a 5 pun (a cognate of a Chinese word, fen, which is equal to 100 yuan) which weighs 6.9 grams.
3.3 6.9 1 pun
() Korean yang coins 5 pun
() 98% copper, 1% tin, and 1% zinc Brass
(95% copper and 5% aluminum) Fun (pronounced "pun" but spelt with an "f" on the coins), is also a cognate of a Chinese word, fen, which is equal to 100 yuan, whilst hwan is a cognate of yuan itself. 
