Nature Publishing Group has launched a new web-based publication, Nature China. Nature China seeks to highlight the best scientific research published in Mainland China and Hong Kong in one convenient portal. AstraZeneca, as sponsor, will support the website for the next two years. In the past decade, the output of research papers from China in the Thompson ISI database has soared from 10,000 papers a year to more than 80,000, which is the same numerical level as the United Kingdom and Japan. The number of very high impact papers (citations in excess of 20) from China has increased ten-fold to several hundred. Nature China is dedicated to highlighting the best research from mainland China and Hong Kong, to provide scientists from around the world with a convenient portal into research drawn from across the scientific and medical literature in all disciplines.