The Chinese Super League club are believed to have forked out between €15 million and €18m for the 28-year-old's services.
Gervinho, who boasts 71 caps for the AFCON holders, had been a key performer for Roma following his arrival in Italy from Arsenal in 2013.
Gervinho scored seven goals and provided two assists in 17 appearances in all competitions for the Serie A outfit this season.
The Chinese topflight season begins in March.