Complex sentence: He passed technical test and chosen by the head coach Ali Daei to be part of team's first team during 2013--14 Iran Pro League, but he not signed with Rah Ahan and joined Persepolis training camp after Ali Daei becomes Persepolis' head coach.
Split into simpler sentences: He passed technical test and chosen by the head coach Ali Daei to be part of team's first team during 2013--14 Iran Pro League. But he not signed with Rah Ahan and joined Persepolis training camp after Ali Daei becomes Persepolis' head coach.