"A tree with cold plum and white jade belt" comes from "Early Plum" of Tang Dynasty.
The specific meaning of this poem is: there is a plum tree that blooms early and its branches are as white as jade. It is far from the village road where people come and go, and close to the bridge. People don't know that the cold plum is close to the stream and blooms early, thinking that it is the snow branch that returns to the soul after the spring breeze enters winter.