He may be an international star, but Chow Yun-fat won't let his star status get in the way of his filial duties or his charitable heart. Currently abroad shooting Pirates of the Caribbean: Dead Man's Chest, in which he plays the famous 15th-century Chinese pirate Cheung Po Tsai, Chow flew in at the weekend to celebrate Mother's Day. After taking his mum for dim sum in the morning, Chow, sporting a grey beard, made a rare public appearance for the Hong Kong Red Cross, encouraging a change in people's sense of charity. 'This city is really good at donating money,' said Chow. 'At the onset of any catastrophe or cause, the first thing we do is hand over our hard-earned cash. But it would be good to see a change in that. How about keeping that money in your pocket and donating some time? Maybe more can be accomplished.' When asked about his new movie, Chow said that since there were some scenes on horseback, he was required to take riding lessons. He had been worried about getting in the saddle again, having fallen off a horse previously, but he said he gained courage from watching children learning to ride. 'The only look they had on their face was happiness,' he said.