The parade marched, the band played and retiring Police Commissioner Tsang Yam-pui received a crisp salute from his colleagues and a hug from his tearful brother yesterday to mark the end of nearly four decades with the force. The 57-year-old police chief, who hangs up his hat today, was also overcome with emotion as he recalled his 38-year career with the force after reviewing a parade of police personnel and vehicles at the Police Training School in Wong Chuk Hang. 'A service spanning almost four decades has given me great pride and honour, particularly as it has coincided with times of tremendous historical and social change for Hong Kong, and for the Hong Kong Police Force itself,' he said. Chief Secretary Donald Tsang Yam-kuen, who was among the guests, was seen wiping away tears as he listened to his younger brother's speech. The chief secretary's eyes welled again as he embraced his brother at the end of the ceremony. The commissioner revealed a double happiness behind the emotional embrace. 'Tomorrow will be my retirement day and the wedding day of my brother's son. So to me, it's double happiness,' he said. Mr Tsang said that while he would miss the force, he was glad to see how it had advanced over the past 40 years from 'a staunchly paramilitary style force' to an agency dedicated to the provision of professional service to the community. He warned of the 'unprecedented change and heightened challenge' for the force in light of the integration with the mainland, international terrorism and declining budgets. But Mr Tsang, who will be succeeded by his deputy, Dick Lee Ming-kwai, said the force was ready to meet the challenges.