What 'Easter Eggs' have you noticed in the novels?

I don't know if Easter Egg is the right word but what 'mirrored scenes' have you noticed in the novels? Or other subtle things?

For example:

In book 1 when SL meets XL he says he was kicked out of home because his parents were quarrelling. In book 2 HongHong-er gives the same reason to XL.

In the Banyue arc XL jumps off the wall and is caught by HC who continues to fight while carrying him. In the flashback to the God Pleasing Martial Warrior arc HongHong-er falls from the wall and is caught by XL who continues to fight while carrying him.

There are a couple of other things I've noticed too while re-reading.

Like that Qi Rong sent some ghost thugs after XL during the Ghost Festival. I guess this is probably why HC was in the area, to protect XL, but was also the reason for the destroyed Ghost Fires...or at least that's my understanding...

What 'Easter Eggs' have you discovered? Or just little things in general you have noticed :)