In the televised version, there was a scene where the mother, played by Irene Ang, told her son, the main character, Recruit Ken Chow, in Mandarin, "你不可以铁牙". "铁牙" literally means "metal teeth" in Mandarin. So, I thought that Mrs Chow did not want her son to have braces. Ken apparently did not understand his mother and also asked her what she meant. Mrs Chow explained that "铁牙" means "stubborn". She was chiding her son for being stubborn. I suddenly realised that it was actually the Hokkien phrase "Tee Kee". Honestly, it sounded very odd on TV to hear it as "铁牙" in Mandarin. So, well, definitely Recruit Ken Chow did not understand – probably, he also did not understand the Hokkien phrase. But I believe most Singaporeans also took a while to get it, to understand exactly what it means. And I am also very sure that our friends in China, Hong Kong or Taiwan also would not know the meaning, even if the same characters were said in perfect Mandarin.