Introduction to Red Flag in Prison: On October 7, 1949, Luo Guangbin, who was imprisoned in the second room of the Ping Dynasty, learned the news of the founding of New China from General Huang Xiansheng. The good news spread quickly, and the fellow victims Chen Ran, Ding Diping and others were so excited that they could not sleep all night. They found a red embroidered quilt, cut it into a square flag, and used yellow paper to cut five-pointed stars, one large and four small. Using their collective imagination and wisdom, they designed and made the everlasting flag in their hearts overnight.