If you're sure the traffic is organic then follow silentg's advice, although developing for the chinese language -if you're not chinese- would be some kind of a feat
If you decide on parking, make sure you leave the domain on each parking service for at least 10-15 days (judging from your traffic) before you test another one.
Since the domain is a number, I'd suggest you check the previous site via archive.org (as silentg suggested) and check the page source for related keywords, description etc.
Then, on the parking service, choose a 2-lander, set those keywords there and wait to see if it works.
good luck