 Complete the following phrase:  Zhong Huandi ; born 28 June 1967 in Yun is a retired Chinese long-distance runner who concentrated on the 3000 and 10,000 metres, and later the marathon. She became a four-time Asian champion and two-time World Championships silver medalist. On 8 September 1993, she became the second fastest 10,000 meter runner of all time, only surpassed by Wang Junxia, the winner of that same race by more than half a lap in what remained the world record until the 