Old materials exchange network, is a very creative new website is also very fire mode, you can spare some of their own stuff and others published in the above exchange.

The Exchanging Fans from Nanjing Exchanging Net worked as volunteers for the kindergarten, showing the deaf kids their love and care, and generating more love toward life, society and their own lives.

The on-demand economy allows society to tap into its under-used resources: thus Uber gets people to rent their own cars, and InnoCentive lets them rent their spare brain capacity.