Click on any of China's 31 provinces/municipalities/regions that are displayed on the map to see the total major grain production harvested in that area broken into the percentages attributed to corn, ...

Filling in the blanks of your historical ... more than 500,000 map scans, which are loaded into TimeMap.org for your perusal. You can also make a free account and add to the collection by ...

For many centuries China held the secret ... its rarity, its historical, cultural and religious significance, and how it would fit in our permanent collection. If the answers are thumbs up ...