Shenzhen, Feb. 23 (UNI) World No. 1 paddlers Lin Shidong and Sun Yingsha both secured spots in the men''s and women''s semifinals at the 34th ITTF-ATTU Asian Cup on Saturday, with Sun edging past world No. 6 Miwa Harimoto of Japan 4-2 and Lin smashing Yukiya Uda of Japan 4-1 in the quarters.