The PhotoPlus EXPO 2019 is on October 24th – 26th. The long awaited Sony a9 II is expected to be announced ahead of this photography show.
Sony currently has one camera code WW942051 registered in China, so most likely this camera code is refer to upcoming Sony a9 II. In other word, we are still not close to Sony a7S III announcement, maybe in early next year. Because official announcement of a new Sony camera is expected two or three months after Sony registered a new camera code. Stay tuned for more info.