From "Swallows on the Beam", the original text is: Two swallows are like two black shuttles, flying out for a while and breaking in for a while, with dirt in their mouths and sticking to the beam one by one.

Using figurative rhetoric, the swallow is compared to a black shuttle. There are two swallows living on the beam of my hall. These two swallows are very small and have slender wings. The tail is split, the whole body is black, and there is only a little gray feather under the abdomen. They flew around on the beam. Shouting softly, as if to say: "Xiao Yong, we are neighbors!" "Nesting has already begun. Two swallows, like two black shuttles, flew out and rushed in, with dirt in their mouths and stuck to the beams one by one. Even on rainy days, they kept working, and a few days later, the nest was built. Zheng Zhenduo (1898- 1958), in the third grade, was an outstanding patriot and social activist in modern China, as well as a famous writer, literary critic, literary historian, translator, art historian and collector at home and abroad. Originally from Changle County, Fujian Province. But he was born in Yongjia County, Zhejiang Province (now Wenzhou City).