A LOT of hard work earned commendations for six police officers and an information officer yesterday while the Police Welfare Fund received a $50,000 boost. The officers were cited for ''outstanding and professional performances'' while conducting their duties by the Commissioner of Police Mr Li Kwan-ha. The $50,000 came from the Chow Tai Fook goldsmith's in appreciation of police help in handling a robbery attempt on its Prince Edward Road store on December 2 last year. Among the special commendations handed out at police headquarters yesterday were for four officers of the Narcotics Bureau who helped break up an international drug syndicate. The four officers, led by Senior Inspector Simon Patterson, were instrumental in working with authorities from the United States and Canada to smash the syndicate. Agents from the FBI, the Drug Enforcement Agency and the Royal Canadian Mounted Police were in daily contact with Inspector Patterson and his staff which included Sergeant Tsang Hin-wing and Constables Choi Kit-sang and Poon Yau-man. The efforts began following a gangland-style slaying of a Hongkong man in New York in 1991. American police suspected the murder was related to drug money laundering and contacted police in the territory. Their efforts culminated in the arrest of eight suspected drug traffickers - two each in Vancouver, San Francisco, New York and Hongkong. Inspector Patterson, his men and corroborating witnesses may yet make an appearance in American court to testify against the suspects. A court case is pending in Hongkong against the locals. ''Hongkong is the hub of the problem because it is a financial centre and the expertise is here to manage the money,'' he said. ''Even though the syndicate had been active here for so long, we wanted to send the message that if they continued, we would get them eventually.'' Others to receive commendations yesterday were Chief Inspector Yuen Yuk-kwan for community relations, Constable Chung Sui-fan for arresting an armed and dangerous criminal and Mr Hugh Witt, an information officer. In an earlier ceremony at the Ho Man Tin police station, Chow Tai Fook director Cheng Kam-biu donated $50,000 to the Police Welfare Fund after the dramatic attempted robbery of the company's store. The daring robbery saw two robbers shot dead and three suspects arrested after a gun battle in which at least 70 shots were exchanged. Four policemen and three members of the public including two American tourists were injured.