This sentence comes from Song Dynasty Su Shi's "Invitation to the West Lake with Mr. Cai Zhun" No. 3:
The bow of the boat is cut with fine strands, and the fragrance of cooking jade floats on the stern.
The meaning of this sentence:
To chop means to chop, here it refers to killing fish; fresh means fish, and jade should be rice.
It also refers to cutting fish at the bow and cooking fish at the tail.
For reference.