This book mainly introduces the origin of the She ethnic group's Black Rice Festival. While areas of the She ethnic group suffered from pests, the land owners increased rents and fees. As a result, the She people were in shortage of food. Lan Tianfeng led people to the land owner's house to steal food. After being found out, Lan Tianfeng stepped forward to protect others and was imprisoned on March 3rd. There was no food in the prison for him. Later, some She people used black rice leaves to cook rice. The jailers did not dare to eat the black rice and passed the rice to Tianfeng. Over time, Lan Tianfeng slowly recovered. Three years later, again on March 3rd, Lan Tianfeng was rescued. In order for future generations to commemorate the feat of Lan Tianfeng and remember how hard to have rice, the Black Rice Festival is celebrated every year.