In the pre-release of Age of Mythology, Wheelbarrow was part of a two-technology line, much like its Age of Empires II counterpart, and increased the carrying capacity of all villagers. Its icon was a higher resolution version of the Age of Empires II icon. Its effect on the carrying capacity was divided by resource over the Pickaxe, Hand Axe, and Husbandry technology lines.
"Shennong taught the Chinese a lot of agricultural practices and he is also credited for inventing the plow, the axe, and irrigation. The Wheelbarrow however, was originally invented by the Chinese during the Han Dynasty (206 BC - 220 AD). As the first wheelbarrows were made out of wood, the Chinese nicknamed the invention the 'Wooden Ox'. Due to its flexibility, the wheelbarrow had a great impact on the development of society."