why you always ask question like this? 0.0, it is too hard , really, i must google material when i answering you. this poem is wrote by LiBai,
小时不识月,呼作白玉盘。
when i was young, i did not know the moon's name, i just call it jade idsh.
月来满地水,云起一天山。
when the moon rising, (cause of the moon light) it seems a lot of water on the ground, and the cloud looks like mountain flies on the sky.
露从今夜白,月是故乡明。
from now on,the day is White Dew( The one of 24 Solar Terms in China), and when the hometown's moon light is always lighter than anywhere else. (here , he want to talk about he was homesick)
峡深明月夜,江静碧云天。
the canyon looks deeper when the moon in the night, and the river is very calm, and water in the river reflected the cloud and the sky
(like his heart, very peace, does not want to fight for anything)