The outer suburbs of Xi’an, in which there are 108,000 hectares of farmland, are the municipality’s agricultural districts. The majority of the farmland is in the northern and north-eastern suburbs and the Yanliang District.

But there was one yet - the biggest, the most blank, so to speak - that I had a hankering after.

Mathematical laws can be proved purely through mathematics, without scientific experimentation.

But they who have not this doubt, and have a mind to see the issue of the Theory, may skip these two Chapters, if they please, and proceed to the following