The word "Jing" means understanding. The two points on the wood represent two orioles, and the green wood is the green willow.
Interesting story: Ji Xiaolan, a scholar of the Qing Dynasty, corrected a scholar's article. His comments at the end of the article were two verses: "Two orioles sing in the green willows, and a row of egrets ascend to the blue sky." The face-to-face quotation is quoted here The scholar did not understand the meaning of the poem. Ji Xiaolan smiled and said: "Two orioles singing in the green willows, I don't know what to say; a row of egrets ascending to the blue sky, I don't know where they are going.