Four people including the supposed ringleader have been arrested in a police crackdown on a fake banknote syndicate in Hong Kong, with officers seizing more than HK$220,000 (US$28,200) in bogus bills.Commercial Crime Bureau officers swooped on an Aberdeen flat on Sunday morning after 34 incidents of shops in Sham Shui Po and other West Kowloon areas receiving counterfeit HK$500 and HK$100 bills from the HSBC 2010 series of banknotes since the middle of last month.In the raid, officers arrested…