Now 55 years old, Kelly is eager to reconnect with Cheng, and has been actively searching for him via appeals on social media.
Kelly's appeals made their way to Mothership's inbox after a tip-off from the admin of a Facebook group.
As she loved writing letters, this was an "opportunity to learn more about the world through another person".
Kelly said that air mail took a long while back then, and this was the most frequent they could communicate.
Moreover, I have to spent more time on my study to prepare for the GCE O-Level examination at the end of this year.
I used to collect stamps, but I'm not as keen now although I still keep the stamps.
Their letters continued for much of their schooling journey until Kelly started college and Cheng enlisted for National Service. »