In 2004, Cui became the champion of Azerbaijan in jitsu . He repeated this success in 2005, 2006 and 2010. In 2009 he became the champion of Azerbaijan in free fighting. He then won an international tournament in Tbilissi (Georgia). In 2011, he once again became the champion of Azerbaijan in free fighting. In the same year he went to the World Cup in pankration and won a bronze medal. In 2012, he became the champion of Azerbaijan in Kung Fu Sanda. It repeats its success in 2013, 2014 and 2015. In 2013, he won the Kung Fu Sanda World Championship in Beijing. In 2014, Kung Fu won a bronze medal at the next Sanda World Championships. He made his MMA debut in 2015 . Debut, October 4, 2015, the Kazakh capital of Nur Sultan, the Chinese athletes takes place against ninth Guangu. In 2021, "Eagles Fighting Championship" organization of the tournament which was held in Moldova on 57 kg weight category champion. Mehman Mammadov trains every day only individually.