China is moving swiftly toward algorithmic governance. Among other things, this means that faces of jay walkers and people who are late in their payments are projected on billboard-sized screens, for everyone to see.
Pi -- or pesky pi as I like to call it -- is that irrational number that represents the relationship between the circumference of a circle and its diameter. Because pi is irrational (it cannot be expressed as a simple fraction) it is not possible to construct a square with the same area as a given circle. Thus "squaring the circle" is a metaphor for trying to do the impossible.