CADAL is the Chinese-American Digital Academic Library - or Chinese-US Million Book Digital Library project. CADAL was co-constructed by Chinese and American institutes and researchers. At present it's co-managed by Zhejiang University Libraries and the Chinese Academy of Sciences Graduate School. The project was initiated by American and Chinese computer scientists, including Prof. Raj Reddy (Carnegie Mellon University), Pan Yunhe (Zhejiang University). According to Wikipedia, there are now 1.5 million books digitised, including 150,000 English digitised volumes. About 3,000 volumes are downloaded every day. From printed books, the next phase will focus on painting, calligraphy, audio and video.
Other countries such as Taiwan, India and Egypt are also said to be involved.
This is a plain vanilla, no apparent frills site. It appears to be for the use of students at Chinese universities only but I created an account and logged in. At one stage it invites you to "sigh in" - I liked that. I searched the image file, which appears to contain about 9,000 images for 'horse' and got 200 results - this loaded quickly but i couldn't see any information about the images - where is the metadata, the enriched bibliographic information? If I clicked a tick box, the site loaded more images similar to that one - that was nice and simple, however, with this digital library, you need to know what you are looking for and what you are doing, as there's very little context to the content.
It looks more like a digital library designed by computer scientists than by librarians.