Ma Longjian is a 22-year-old professional football player from CHN. He currently plays for Beijing Guoan U20, wearing the number 99 shirt. He plays primarily as a Defender.

Throughout the Chinese Football Assorciation U-20 League 2025, Ma Longjian featured in 26 matches, averaging 0.7 tackles, 0.3 interceptions, and 0.3 clearances per game, while blocking 0 shots per game.