Ask what this calligraphy means, what is this calligraphy like and what grade it is!

The empty mountains are bathed in a new rain, and feel the early autumn at night. The bright moon shed clear light from the cracks and cleared the fountain on the rocks. The bamboo forest is sonorous, the washerwoman returns, and the lotus leaves are swaying to get on the canoe. Spring spring might as well give it a rest, and the autumn sun can stay on the hills for a long time. I can't read the inscription clearly, probably: a poem written by Tang Wangshan in autumn and a book written by Geng Yin in spring ... It is well written, with smooth brushwork and patchwork strokes, which has certain characteristics and can be called a masterpiece. It seems better if the first four words can be consistent with the overall style in thickness contrast.