By Wally Pyrah DENNIS Yip’s exciting young sprinter FAST NETWORK takes centre stage when he seeks to retain his unbeaten record and complete a hat-trick, in the Federation of HK Guangdong Community Trophy Handicap (9.05am) over five furlongs. This son of former Breeders Cup Turf Juvenile winner Wrote has already looked the real deal with two convincing victories over the course and distance, with the latest coming early last month. Jockey Zac Purton is normally hard to please, but even he has been complimentary about the four-year-old, who continues to improve in both his track work and trials…