In 'Roman numerals' “X” is equal to the number 10.
(..) without Soo Lin Yao. Oh, good. Two men who travelled back from China were murdered. And their killer left them messages in Hang Zhou numerals. Soo Lin Yao is in danger. That cipher, it was just the same pattern as the others. He means to kill her as well. Look, I've tried everywhere - (..)2010 TvShow: Sherlock Title: The Blind Banker Season: 1 Episode 2