Mainland China has become the main revenue earner for companies selling product-design and innovation software in the region. Steve Su Yulong, Pacific Rim vice-president for United States software developer PTC, said that, since last year, the mainland had overtaken Taiwan as its largest revenue contributor in the Asia-Pacific region. Mainland sales had grown between 30 per cent and 40 per cent annually in the past few years. During the past two months they had continued to grow despite the increased pace of the global economic slowdown and cuts in information-technology spending. This ran contrary to Nasdaq-listed PTC's overall performance. It had a net loss of US$24.9 million in the quarter to September 30, compared to a net profit of US$6.91 million before. Turnover was down 4 per cent, to US$225.43 million. Mr Su said China growth was partly driven by an increase in purchases by state-controlled manufacturers of product-design software as they enhanced efficiency in anticipation of greater competition, as a result of World Trade Organisation membership. 'Two years ago, our mainland clients were multinational and private companies. Now we have a lot of state companies as clients whose new generation of leaders are younger and more aggressive,' he said. Customers include consumer electronic appliance-makers TCL International Holdings and Gzitic Hualing Holdings, as well as telecommunications switch-makers Huawei Technologies and Zhongxing Telecom. PTC's software helps manufacturers cut down the amount of time it takes to design a new product, by allowing engineers and designers to share information on a real-time basis over computer networks.