ther cities of this period have been recently excavated and must have
had populations far above 10,000 persons. There were two types of
cities: the rectangular, planned city of the Chou conquerors, a seat of
administration; and the irregularly shaped city which grew out of a
market place and became only later an administrative centre. We do not
know much about the organization and administration of these cities, but
they seem to have had considerable independence because some of them
issued their own city coins.

When these cities grew, the food produced in the neighbourhood of the
towns no longer sufficed for their inhabitants. This led to the building
of roads, which also facilitated the transport of supplies for great
armies. These roads mainly radiated from the centre of consumption into
the surrounding country, and they were less in use for communication
between one administrative centre and another. For long journeys the
rivers were of more importance, since transport by wagon was always
expensive owing to the shortage of draught animals. Thus we see in this
period the first important construction of canals and a development of
communications. With the canal construction was connected the
construction of irrigation and drainage systems, which further promoted
agricultural production. The cities were places in which often great
luxury developed; music, dance, and other refinements were cultivated;
but the cities also seem to have harboured considerable industries.
Expensive and technically superior silks were woven; painters decorated
the walls of temples and palaces; blacksmiths and bronze-smiths produced
beautiful vessels and implements. It seems certain that the art of
casting iron and the beginnings of the production of steel were already
known at this time. The life of the commoners in these cities was
regulated by laws; the first codes are mentioned in 536 B.C. By the end
of the fourth century B.C. a large body of criminal law existed,
supposedly collected by Li K'uei, which became the foundation of all
later Chinese law. It seems that in this period the states of China
moved quickly towards a money economy, and an observer to whom the later
Chinese history was not known could have predicted the eventual
development of a capitalistic society out of the apparent tendencies.

So far nothing has been said in these chapters about China's foreign
policy. Since the central ruling house was completely powerless, and