How to tie' 'chung/chang/zong zi'

Before we can start our attempt to make  'chung/chang/zong zi', we must learn how to tie it tightly.  There are many ways to do it,  as long as the chung/chang/zong zi' is tied properly and does not get unwrapped while boiling, then you have achieved success in tying.  Whatever shape you desire is preference and i prefer the triangle shape and i would like to show you how to tie with a strand of string.  What?  Isn't it is tied with a strand of string  as usual!!!! yes, but my single strand does not need any preparation.  With the normal /usual way, the strings are plaited together and hung onto something, like the chair-back or put through a pole which is put on top of 2 chairs, etc. The purpose of hanging the plaited strings this way is, so that the string would be taut enough to allow you to tie the chung/chang/zong zi' as tight as possible.  Forget about this prep, and begin to learn how to tie it my way.........