sentences:  Cao Lei started weightlifting training at the age of 11 and attended Daging City sports school in 1997 when she was selected to the Heilongjiang province weightlifting team coached by Qixi Fu.Lei made her debut in the international field in 2001 after winning the national championships in Asian Championships 63 kilo category by winning gold with a result of 107,5 kg (a junior world record at the time) in snatch, and 127,5 kg in clean and jerk, totaling 235 kg.The next year she started training with national team under the supervision of Ma Wenhui and she moved 69 kilo weight class in which she won the junior world championships 2003 with 105+140 kg performance.