Hi Mr. Chan, not sure if you remember me. I have vivid memories of your geography classes in 1998 and 1999. Once, almost the whole class was not awake, and I remember catching a sleepy glimpse of you still speaking passionately. It didn't mean much to me then, but I realise today the immense strength it takes to do what you did. It is for me a lesson beyond geography and I would like to say, thank you.