How can I get linux-headers for Shunya Lebuntu OS?

Products Support HiKey970
#1

uname -r shows the kernel version is 4.9.78-147538, and I can’t get the linux-headers-4.9.78 from apt-get install.
So how can i get linux-headers, or Lebuntu kernel sources?

#2
#4

Thaaaanks a lot. ^ ^