Poetry and wood-block printing flowered in this period. The [[Five Classics]] were published by [[Feng Dao]], the Chinese [[Johannes Gutenberg|Gutenberg]]. The canal and dam system of northern China fell into disrepair, leading to extensive flooding and famine. Commerce grew so quickly that there was a shortage of metallic currency. This was partly addressed by the creation of bank drafts, or "flying money" (''feiqian''), as well as by certificates of deposi | Poetry and wood-block printing flowered in this period. The [[Five Classics]] were published by [[Feng Dao]], the Chinese [[Johannes Gutenberg|Gutenberg]]. The canal and dam system of northern China fell into disrepair, leading to extensive flooding and famine. Commerce grew so quickly that there was a shortage of metallic currency. This was partly addressed by the creation of bank drafts, or "flying money" (''feiqian''), as well as by certificates of deposi |