Douglas Whyte equalled the Hong Kong season's riding record, held by no less a rider than himself, when he completed a double - with no help from premier trainer John Size - on a soggy and biased Sha Tin all-weather track. Favourite Aqua-Treasure showed all the anticipated improvement in landing the sixth event and obeyed the primary rule of racing landmark wins; they're achieved in nondescript races by very modest thoroughbreds. 'I went out there today with only one thing on my mind - I was determined to get him to the front,' Whyte said. 'At his previous start, Socrates led us and mucked us around a bit, and I didn't want a repeat of that today. 'I thought that if he got to the front, he could control the race and I was so determined that if something had come to take me on, I would have gone faster for as long as I had to, just to make sure I kept the lead.' Such exertions were not necessary. When outsider City Surfer surrendered his dubious entitlement to take up the running, Whyte was then able to steady Aqua-Treasure and a very soft mid-section of the race made victory a formality. In the straight, in sharp contrast to the way he folded tamely after looking certain to go past Socrates last start (May 3), Aqua-Treasure showed loads more character this time and nailed the Class Three handicap with 21/2 lengths to spare. Noted all-weather track performer Wadadelight (Anthony Delpech) worked his way through the field to get second, with Millennium Spirit (Brett Prebble) using the advantage of a rails run to rally for third at the expense of Socrates. Two seasons ago, Whyte became the first jockey to ride a century of winners in Hong Kong - on Lucky Encounter at Happy Valley on June 9, 2004 - and then set the bar even higher with six more winners before going to the summer break. Last season, he had to sit out four separate suspensions as he failed to secure a second century by just two wins. However, over the past three months Whyte has never looked like failing to gain his second ton and yesterday he equalled his own 106 benchmark, and with four meetings to spare. Whyte's opening winner yesterday, Wonderful Boy in the first of the two divisions of the Class Five, is trained by Francis Lui Kin-wai. Whyte explained that being able to follow the fence is the be-all and end-all for this bottom grader. 'The other day, we drew barrier 11 and we were trapped deep all the way in the race won by Super Special,' he said. 'But today, from barrier two, we were always going to get a lovely run and he was very comfortable on this soft ground. That's the key to this horse, if he has the fence to follow he's a completely different horse.'