According to the plot of Ma Xiaotiao Playing Mathematics, we know that the Four donkey kong refers to Ma Xiaotiao, Mao Chao, Tang Fei and Zhang Da.

In the book, they solved the difficult problems in life with a mathematical eye. They used the power of mathematics to escape from the red-haired people in the tropical rain forest, solved the password of the mathematics kingdom, studied the secret of fried eggs, and solved the age of grandparents. In this book, "Four donkey kong" is proficient in mathematics.