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Books about Yanfen:
Yanfen shi ji (Mandarin Chinese Edition) by Yongzhong (1990)
Zhongguo you mo /Cai Yanfen bian (Mandarin Chinese Edition) (1990)
Wiki information Yanfen:
Lin Yanfen is a Chinese female badminton player of the 1990s.
Li Yanfeng is a Chinese discus thrower. Li won China's first discus world title. Her personal best throw is 67.98 metres, achieved in June 2011 in Schönebeck. The Chinese, and Asian, record is currently held by Xiao Yanling with 71.68 metres.