Turan had a difficult start to life at the Nou Camp after joining the club from Atletico Madrid in 2015.
Only six months after joining Barca, a lucrative offer came which would have seen him join Ramires, Jackson Martinez, Alex Teixeira, Gervinho and Fredy Guarin in China.
"Last season, a club from China have offered 50m euro to Barcelona for me but they rejected it because I'm a long-term project," Turan told Beyaz TV.
"Barcelona didn't sign me just for six months."
The 29-year-old also rejected suggestions that he does not give his best for the Turkey national team after manage Fatih Terim dropped him from the squad.
"My exclusion from the national team is not about the alleged bonus incident. I make so much money, why would I care about a bonus prize? It's our coach's decision.
"But I have been the captain of this team for 10 years. They [Turkey fans] booed me at the Croatia and Spain games. I was upset because we looked bad to Europe.
"I don't accept the perception that I perform below expectations on the national stage. My Turkey performances were always better than my club performances. I love Turkey and our team."