I was on KA 900 HGK-PEK recently, and it was clear from the set map in the reservation that the flight was planned as the new F, which did end up being the case. The seats seemed to be exactly the same as the long-haul CX J, in a 1-2-1 configuration (center seats slightly facing each other and the two window seats angled outward). I don't remember what it was, but a hot breakfast was served.