can i get into china with a one way ticket

You can't get a China tourist visa if you only have a one way ticket, since the Jan 1, 2012, the new regulations on tourist visa for sightseeing or family visit prescribes that:
Applicant applying for tourist and family visa (L-visa) also need to provide:
1. Invitation letter from a Chinese organization or a permanent resident in China; or
2. Air ticket booking record (round trip) and hotel reservation;

If you have an invitation letter from a Chinese organization or a permanent resident in China, you don't need any airline ticket and/or hotel reservation at all.