Ask-a-Dave's-Gardener: Need to help indentify a tree branch and leaves, 1 by thutrangvu

thutrangvu wrote:
Hi everyone,

I bought this kind of tree branch since Christmas. I thought they were dead branches and I put them in a vase as a Christmas bouquet with just water. After Christmas and New year, I intended to clean up the vase and found out that they are still alive.
Then I change water daily for them. Now they have more young green leaves.
I don\'t know what type of tree branches and leaves they are and how to plant and save them?
Can anyone help me to find out my questions?