Yes it was already agreed that it is a term to describe a SR x XB hybrid, that was not in question. The farm puts "Tong yan" in brackets because it is a general term used to describe the hybrid... if they just put "crossback splendour" no one would know what that was and assume its just a xback.
What i was saying was that "Tong yan" is not a brand name created by someone (like you said) to market their fish, it is a general term used to describe a XB X SR. Sure it was coined by someone, but its not used to sell that farms SR x XB exclusively as everyone uses TY to describe theirs too