How do you say Peer-to-peer in Mandarin?

One more update on P2P lending: here is a Chinese P2P lending project called PPDAI. It turns out that most lending in China (not much of a surprise) is P2P (the old-school, IRL type), usually between relatives. Most Chinese don't have access to bank financing, apparently. This could be amazing to watch: 1.3 Billion peers... wow.