An excellent map of China. (Photo: Reddit user wildeastmofo)

For a year, a retired teacher in China worked on the project on his terrace—a scale map of the country, more than 30 feet wide.

Each province is carefully marked with a sign, and the map includes islands off the coast in the South China Sea.

The teacher, Cai Mingxing, lives in Guangdong. 

Reddit user wildeastmofo posted a picture of the map; more photos are at Best China News. This is the second excellent scale map of China in recent memory: In 2015, a retired agricultural technician in China made a map of the country using 30 varieties of rice.