What is this series? – Series 31
It is very easy and is it the tail of a rare peacock? Who know, may be it is…
Series 30’s answer can be found HERE.
This is the preserved salted mustard that I used to cook the salted vegetable duck soup. You may want to know more about this vegetable HERE.
GUAI SHU SHU 
Took me a while but I am guessing Kiam Chai because you had kiam chai soup the other day haha.
haha