What do you mean by signing the first volume and signing the second volume?

This means ups and downs, and finally tends to be flat. Maybe it's just a system error, which means this thing is unreliable.

This sentence describes the ups and downs of a life or a thing, from the initial passion and challenge to the final prosaic.

Signing the last volume refers to the trend of a fortune or result. At first, it may have ups and downs, and it will experience some twists and turns, but it will eventually become dull.

This may indicate that the change of life or things is full of variables, sometimes experiencing peaks and valleys, but eventually finding a relatively stable state. However, this may also be just a system error, indicating that this prediction or result is not reliable. Therefore, we should treat this result or fortune prediction rationally and don't rely too much.