What is the inscription on the couplets of the moon and the sky?

Inscription couplets are an ancient literary form in China, which usually consists of two symmetrical lines. But what you said is not a complete inscription couplet, because the inscription couplet usually contains four lines of poems, namely, the upper couplet, the lower couplet, the left couplet and the right couplet. So what you said is a part of the upper part, without the contents of the lower part, the left part and the right part. We're not sure what's under it, Ming Xiu.