Poetry is the sentence that makes up poetry. Poetry usually limits the number of words in each sentence according to its format. China's earliest poems were structured with metrical poems, and the metrical requirements were strict. For example, the poems in the pre-Qin period are generally four words per sentence, which can be found in the Book of Songs. Later, it developed into a five-character or seven-character rhythmic poem, which was found in Tang poetry. After the further development of economy and culture in Song and Yuan Dynasties, the content of poetry was gradually expanded and deduced. In the later period of the new-democratic revolution, poetry evolved into a free poem that was not limited by the number of words.
Money is the product of commodity exchange. At the end of primitive society, the earliest currency was physical currency. Generally speaking, nomadic people use livestock and hides to realize the function of money, while agricultural people use grains, fabrics, farm tools, pottery, seashells, pearls and jade as the earliest physical money. Gifts are things that people give to each other to express their blessings and wishes or to show friendship in social activities.