AT the crack of dawn,Peng Chunling can be found busily loading ripe watermelons onto a truck.From growing grains to planting melons in a highly efficient agricultural operation,villagers like Peng of Zhenzhuozhuang Village,Suqian City in Jiangsu Province,have seen their incomes rise and livelihoods flourish.And all the positive changes can be ascribed to one thing-construction and upgrading of rural roads.