Champion Stakes winner Cirrus Des Aigles could only finish fifth as California Memory ran out a game winner of the Cathay Pacific Hong Kong Cup at Sha Tin.
In a race run at a sedate pace as Gerald Mosse crawled up front on Pure Champion - known as Steinbeck when trained by Aidan O'Brien - the Matt Chadwick-ridden California Memory was always in a handy position.
Local champion Ambitious Dragon swept through out wide a furlong and a half from home looking menacing, but could not go on from there, as Tony Cruz's California Memory found another wind to readily see off Irian and Zazou.
Cirrus Des Aigles never really got in a serious blow, while Byword was sixth for Andre Fabre.
Corine Barande-Barbe, trainer of Cirrus Des Aigles, said: "He's done less out there than he would in a stretch in the morning and has come back dry, he isn't even blowing."
Michael Hills was eighth on Ransom Note for his brother, Charlie, and said: "It became difficult when I found myself pinned on the rails. The horse was going perfectly well but I had to revert to Plan B, and he just wasn't quick enough in the end."