Shaanxi, Zichang's sloping terrace is probably not a good idea. Present requirement on terrace field is that it should be able to withstand a severe
rainfall of the 20-year variety for a 24-hour duration. Slope of this steepness should not be used for cultivating crops.
Picture source: Land Resources in the Loess Plateau of China, edited by The Northwest Institute of Soil and Water Conservation, Academia Sinica, published by Shaanxi Science and Technique Press, 1986.