Lau Gan-Lan's line "No! Not my Cabbage Corp!" is a reference to the Cabbage merchant from the original Avatar series who would often say "No! Not my cabbages!"
It is revealed that Lin possesses the ability to sense things in the Earth like her mother did.
Lau Gan-Lan: No! Not my cabbage corp!
Tarrlok only appears in the opening sequence, but not in person.