Shopfronts on a Street

Translator's note. A street is not a river. The piece reaches that conclusion by a neat piece of reasoning: assume the street is water, work out what follows, and note that the prediction fails on every shopping street in the country. The original includes a diagram with Chinese labels — orientation and unit numbers drawn on a plan — which has been replaced here by a table.

Two definitions govern a row of shops facing a road, and both are counter-intuitive. The road is not a river, and the corner is not a corner. Get either wrong and the whole row reads backwards — which is why so many confident verdicts about commercial streets are simply inverted.

1. The street is zero. Not water, not sand. Zero.
2. A crossroads is water.

Get either wrong and the row cannot be read.

Why the street cannot be water

Suppose we treat the road as water and follow the consequences for a row of shops on its northern side, call one of them A, and a row on its southern side, call one of them D. Assume the other directions are identical for both.

For the northern shop A, the road lies to its south. Then the south-east and south-west of A are inauspicious water and its south is auspicious water — two bad, one good.

For the southern shop D, the road lies to its north. Then the north-east and north-west of D are auspicious water and its north is inauspicious water — two good, one bad.

The prediction follows immediately: every shop on the southern side should do better than every shop on the northern side. Not on average. Always.

That is not what streets look like. On any commercial road, the northern side has its successes and its failures, and so does the southern side, in roughly equal numbers, in every city, in every decade. A theory that predicts a clean split and is contradicted by the visible arrangement of every high street is not being applied badly. It is the wrong premise.

Why zero is the right premise

Step back and ask what a street physically is.

A street is a shared surface. It carries the same traffic past every unit on it, receives the same rain, drains the same way. It has no preference among the shops it serves. When a storm floods the road to knee height, the water enters every doorway on both sides.

A thing that affects everyone identically cannot be the cause of their differences. The street's contribution is a constant across the row, and a constant cancels out of any comparison. What makes one unit prosper and its neighbour fail must lie somewhere the two do not share: the terrain behind them, the buildings opposite, the heights and water in the directions that differ from unit to unit.

So the street enters the calculation as zero — the baseline from which each unit's own surroundings are measured. This is the same role the sea plays on a coast. It is present, it is large, and it contributes nothing differential.

Reading a row

Take a row of six units on the north side of an east–west road, with identical flat ground to their east and west. What distinguishes them is what lies to their north — behind the shops — and in their diagonal sectors.

Unit	North	NE / NW	SE / SW	Verdict
B	auspicious sand	auspicious water	—	strongly auspicious
C	auspicious sand	inauspicious sand	—	somewhat inauspicious
E	inauspicious sand	—	auspicious sand	somewhat auspicious
F	inauspicious sand	—	inauspicious water	strongly inauspicious

Note what the table does and does not say. It does not rank the six units against the units across the street. It ranks them against each other, on the same side, on the basis of differences that actually exist between them. Unit B and unit F may be fifteen metres apart and facing the same road, and one is strong and the other is ruinous — because the ground behind them differs, and the diagonals differ.

The double-street case

Some rows are bounded by a street at each end, or front and back. Both streets are zero.

This is the point at which careful readers make a specific error. Having accepted that a street is zero, they then look at two streets flanking the row and treat them as a pair of waters in opposition — one element on each side of the site, both large, both influential.

There is no pair. There are two zeros. A zero on each side of a site is not a symmetrical water configuration; it is a baseline on each side, leaving the row to be read from its internal heights and from the remaining directions. The error matters because paired water in opposition has its own rules — and applying those rules to two streets would produce confident verdicts about a situation the rules were never designed for.

The general rule

The lesson generalises past shopfronts. Before reading any site, decide what each large feature is — element, or datum. A datum is something that affects all positions equally and therefore explains no difference between them. An element is something that arrives with a direction and a quantity, and therefore does.

Most confident readings go wrong at this first step, and they go wrong in the same direction: treating a shared, neutral surface as though it were an active element, and then building a theory of the neighbours' fortunes on top of it.