According to the aviation news portal FlightGlobal, The Asian carrier is looking for a package deal that includes terms for the leaseback of the 777-200s, as well as at least one proposal for the A350-900s, the A320s or the 787s.
The -200ERs up for sale and leaseback are MSNs 34586, 34587, 34588, 34589, 34590, and 34591.