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Chinese two-time Grand Slam champion Li Na (L) signs autographs for young tennis players during the 2017 WTA Wuhan Open Project event in Wuhan, capital of central China's Hubei Province, on Sept. 28, 2017. (Xinhua/Cheng Min)
Chinese two-time Grand Slam champion Li Na (L) signs autographs for young tennis players during the 2017 WTA Wuhan Open Project event in Wuhan, capital of central China's Hubei Province, on Sept. 28, 2017. (Xinhua/Cheng Min)