Hongqiao pig cake. Hongqiao pig cake is a very famous specialty snack in Hongqiao Town, Jiang'an County, Sichuan. Zhu'er cake, also known as Ye'er rake and duck cake. The origin of Zhu'er cake is said to date back to the Eastern Han Dynasty. In the early years of the Eastern Han Dynasty, Wang Mang sent troops to hunt down Emperor Guangwu Liu Xiu. Liu Xiu fled all the way and ended up in today's Jiang'anhong. Qiao, because he tasted this food made in the shape of a "pig", he nominated it as "Pig Cake". Jiang'an County is affiliated to Yibin City, Sichuan Province. It is located on the southern edge of Sichuan, on the bank of the Yangtze River, east of Yibin, and at the intersection of three cities (Yibin, Luzhou, and Zigong).