Trees, Shrubs and Conifers: Help for a cunninghamia, 2 by Weerobin

Weerobin wrote:
I have a cunninghamia lanceolata planted next to my deck.
By all appearances it has been thriving and is now ~20ft tall.
I noticed today it has several points where sap is running down the trunk.
It's too high for me to get a close look at the source on the trunk.
Is this just from some sort of sapsucking bird or is it a more ominous sign?
There's no other sign of ill health, at least nothing I've noticed.
Thanks for any info.