Mapmatrix offers free and very detailed maps of Beijing (city map, Forbidden City, Summer Palace) and maps of Shanghai (city map, Hang Kou Garden, Lu Xing Park, region map) in pdf-format. Good quality maps you can use for the Beijing 2008 Olympic Summer Games. Follow the html link of a map and in the next screen click on the ‘download free map link’ (most maps are larger than 4MB, so please be patient). You can download a pdf-reader here. If you like their maps and want more free maps in the future, you can support them by donating money (PayPal).