Wang Zhiyi seems to be rising steadily; personally,I'd like to see her developed into a more proactive player, esp when playing fast attacking opponents by mixing up her shots well with good repertoire and deception t keep them guessing and then going on the offensive by suddenly injecting pace. For that, she also needs to improve her physical strength and stamina, the more so to deal with remarkable retrievers. As for Li Shifeng, he is promising, if only he has at least 70-80% of Chen Long's physicality, I daresay he may get inside the top 10 in another year or so. I would say the same applies to Sun Feixiang. That's just my opinion.