20,000 Years To Make Toilet is a children's popular science graphic book written and illustrated by Kuang Chu and colored by his wife, Tia Xia. The book tells the history of toilets and drainage systems in a humorous and entertaining way.
The Chinese version of the book, published by 'Xin Lei' publishing house, has been very popular with Chinese children and has sold over 100,000 copies. The English version shown here was published independently by Kuang Chu and was used as a sample and sold in small quantities.