APPRENTICES past and present showed the international racing community the wealth of talent among Hong Kong's home-grown riding ranks at last night's Happy Valley prelude to Sunday's showpiece Sha Tin fixture. Star of the show was the female claimer Win L. F. Chung who brought home the 52-1 bolter Eighteen Twelve in exemplary fashion in the feature Hong Kong Football Club Centenary Cup for her English mentor David Oughton. When the rail is out for the Happy Valley sprints it is imperative to be up on the speed. Chung had Eighteen Twelve smartly out of barrier nine in this 1,200-metre feature event and then showed experienced beyond her years to sit quietly on the heels of leader Sun-Rise, waiting until halfway up the home straight before asking her mount for a race-winning effort. The result was a half-length defeat of Sun-Rise, leading to a rousing reception as she returned to the winner's enclosure and a glowing tribute from her trainer for her fourth career success. Oughton enthused: 'I couldn't have asked for a better ride from a senior jockey. Win was brilliant. She did everything absolutely perfectly. 'She got out, she sat still and she then picked him up and got him really travelling to the line. 'She's always ridden well through a race. She's worked hard on her finish and is an all-round asset to my stable. I'm chuffed to bits for her.' Champion apprentice Simon 'Hong Kong' Yim showed why he is exactly that - the territory's leading claimer - with a copybook display on Sensible Choice for his guiding light Patrick Biancone in the evening's local riders' affair. With New Asia Sage and Colours Hero disputing the lead, and Sweet Win and Nansen driven up to join them on the outside, Yim wisely sat poised in their slipstream, smack against the paint. He allowed Sensible Choice to slide to the front when the leaders predictably weakened off the home turn and from there on in, Yim only had to keep Sensible Choice up to his work to hold Champion Mascot and Ellen's Romance by 11/2 lengths and three-quarters of a length. Last night's victory was Yim's 41st career win and he needs just nine more to graduate to the senior ranks - a remarkable achievement from an apprentice who took well over two years to taste success. Biancone, justifiably proud of the way his protege is developing, beamed: 'A small horse was suited by a small track but full marks to Simon, he rode a lovely race.' Times are distinctly harder for tough local jockey Jackie C. K. Tse - Danewin excepted - compared to when he was the runaway champion apprentice and up there with a realistic chance of the senior title, too, in the 1990-91 campaign. But last night Tse delivered the goods for favourite punters in impeccable fashion on the heavily backed Supreme Universe in the 2,200-metre second event. Elite and So Easy led with Tse taking a sit beyond mid-division. He moved forward from the Rock, eased out for a clear run at them coming off the apex of the home bend and won going away on the Alex Wong Siu-tan-trained progressive son of boom stallion Salse. Tse said: 'He's a good young stayer in the making. 'It's great to get on a horse with a good chance especially during International week.' Darryll 'The Dazzler' Holland, himself a former champion apprentice in England, illustrated why he has quickly become a darling of the betting public with a smooth-as-silk performance from last to first on David Hayes' rapidly improving Above All in the last. Not to be outdone by the young guns, master jockeys Tony Cruz and Basil Marcus were also on the scoresheet. Cruz conjured a maiden win from habitual bridesmaid Racing Ace for the in-form Tony P. H. Chan in the sixth, despite his mount hanging badly left. Marcus made all on Success Partners for Ivan Allan in a very strong win in the opener from a youngster going places.