The wind in Leng Yue is thin, full of light, slightly warm and lonely all night. What poem is it?

It is a seven-character poem selected from Mao Zedong's poems. This poem was written in 1935 and 10, when Mao Zedong led the Central Red Army across Minshan, and the Long March was coming to an end. Looking back on the numerous difficulties and obstacles overcome by the Long March in the past year, he was full of joy and fighting pride.