"After significant reflection, I have decided to join Shanghai Shenhua FC of the CSL," Martins tweeted on Thursday.
He joins a host of high-profile foreign imports to have relocated to China in the past few weeks, including Ivorian striker Gervinho, Brazilian midfielders Alex Teixeira and Ramires, and Colombian striker Jackson Martinez.
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(Reporting by Simon Jennings in Bengaluru; Editing by John O'Brien)
