Shanshan Feng perfect shallowing slow motion. Very interesting motion during the transition, when the shaft is quickly changing plain. Shanshan Feng (Chinese: 冯珊珊; pinyin: Féng Shān Shān, Mandarin pronunciation: [fə̌ŋ ʂə́ŋ ʂə́ŋ]; born 5 August 1989) is a Chinese professional…