The above sentence comes from Ouyang Xiu's poem Canglang Pavilion in the Northern Song Dynasty: "The breeze and the bright moon are priceless, but it's a pity that they only sell for 40 thousand."
The next sentence comes from Su Shunqin's poem "Crossing Suzhou" in the Northern Song Dynasty: "All the green willows and egrets are complacent, and all the mountains and rivers are affectionate".