Longshu the 9th Special precocious super high yielding disease-resistant sweet potato varieties - Longyan City, Fujian Agricultural Science in 1998 to the 5th Yanshu as female, 57 male parent Jinshan bred by sexual crossing. 2004 by Fujian Crop Variety Approval Committee. Characteristics parietal green, veins, veins base and handle groups are lavender, light green leaves. Short vine, stem diameter medium, branching and strong, semi-erect plant type, more vigorous leaf growth potential. Tuber number about five, high and medium-sized potato, tuber set, tuber size more uniform neat, spindle tuber, red skin potato, potato flesh pink. Seed germination medium, long seedlings faster. Storability medium tuber. Drought, water logging, resistance, barren, cold resistance, wide adaptability. High resistance to fusarium wilt, high resistance to potato blast Ⅰ group. Rate of about 22% dried tubers, flour yield about 10 percent, eating soft and sweet. Yield participate 2001-2002 test results of new varieties of sweet potato area in Fujian Province, two-year average yield of 3786.85 kg of fresh potatoes, compared to the control Jinshan yield 47.62% 57; 805.3 kg dry matter yield than the control Jinshan 57 yield 20.28%. Growth period at 90 days, the fresh potato yield of up to 2840 kg Contact: 18803196363 QQ: 107545142 Zhang Yuting