This chinese dynasty was famous for its porcelain and walls.
qing
yuan
ming
chin

In the Ming Dynasty three major advances were made in the production of ceramics, white ceramics made of porcelain, the famous blue and white pottery of this period, which can claim the main attention. It had various styles of decoration and coloring, the yellow, the imperial color, developed successfully especially during the reigns of Hung Chih and Cheng-te. The demands of European trade began to have an effect, both on the form and the decoration, and the ceramics exported were of generally lower quality.

These islands/chinampas then provided rich soil for crops with easy access to water. i hope this is correct, im so sorry if its not !