Financial Secretary Donald Tsang Yam-kuen plans to add convertibility of the yuan to a list of topics in talks with mainland officials this week. However, a free-float of the yuan would not have an impact on Hong Kong's currency, Mr Tsang said yesterday in Beijing. 'Hong Kong dollars and the yuan are moving on different tracks,' he said. 'Every time the yuan has gone up or down in the past 10 years, Hong Kong's currency was not directly affected.' Mr Tsang said the mainland's export trade would benefit from a weaker yuan. 'Hong Kong, particularly the transport, banking and insurance industries, would benefit, as more mainland goods would be exported through the SAR,' he said. A free exchange of the yuan would also reduce pressure on its appreciation and depreciation. The mutual economic development of the mainland and Hong Kong after Beijing joins the World Trade Organisation will be one of the subjects discussed during Mr Tsang's three-day visit to the capital for a series of meetings. He is to meet Vice-Premier Qian Qichen, Hong Kong and Macau Affairs Office Director Liao Hui, Foreign Trade Minister Shi Guangsheng and People's Bank of China deputy governor Liu Tinghuan.