Looking up, I found it was moonlight and sank back. I suddenly thought of a kind of medicinal material at home.

Pregnant with cultivated land.

Interpretation and analysis: The next sentence of "Looking up, I found it was moonlight" was "Sinking again, I suddenly thought of home". This poem is about missing my hometown, and it can also be understood as missing my familiar hometown and place. Therefore, it can be associated with blindly taking Chinese medicine, which means "cherish cultivated land".

Rehmannia glutinosa is a traditional Chinese medicine. Rehmannia glutinosa is the rhizome of Rehmannia glutinosa or Rehmannia glutinosa of Scrophulariaceae. Manufactured by hand, it is recorded in China's ancient medical works. The medicinal properties and functions of Rehmannia glutinosa are mentioned in Pearl Capsule, Compendium and Jingyue Quanshu.

Extended data:

Commonly used guessing methods are:

1. Off-plane method: separate some words from the crossword puzzle to match the answer.

2. pictographic method: according to the characteristics of things, the structure of Chinese characters is personified and visualized, which makes people associate and increases interest.

3. Portrait: This riddle is based on the overall picture meaning of the riddle.

4. Direct homophonic method: When making riddles, words with the same or similar pronunciation should be used instead of words, so as to distract people's attention and achieve the purpose of hiding riddles.

5. Homophonic method: first decompose some words in the puzzle, and then homophonic the answer.