Early in the morning we have to get up and turn up the soil where the early rice has just been havested with the plough. First we break the soil into pieces with barrow, then we ridge the land with the hoe. About 70 centimeter there is a ridge. And during the process of ridging, the organic fertilizer must be filled in. After the ridging is finished, we could transplant the sweet potato seedling and water them. Most of the time we have to work under the strongest sunshine. For those who never did such kind of work, it's impossible for them to understand the toughness.