What is the example of the poem "Looking at Yuanyang on the Liuli River"?

For another example, he came to Liulihe River in the southwest of Beijing and saw that the water here was "extremely clear, surrounded by lush trees, and there were many mandarin ducks in groups." And wrote the poem "Liu Liwang Yuanyang". In the past, the forests here were lush, the water was clear and transparent, and thousands of wild mandarin ducks were in droves. Today, it no longer exists.